F100 Restomod · Guide Library · Bumpside

Generation Guide · 4 of 6 · Lowered Street-Truck Build Guide

1967–1972 Ford F-100 — Bumpside

Fits · 1967–1972 only — this IS the generation guide

The flagship generation — and this site’s home turf. Drop beams, Crown Vic swaps, axle flips, and every motor from a Windsor to a Coyote, with the prices and cautions checked line by line (including two corrections to earlier drafts, noted where they land).

Crown Victoria front suspension cradle for an F-100 swap

About This Guide

Build philosophy: Get the stance right, improve steering and brakes, and keep the original truck’s character. A great street truck does not require a Coyote swap or an expensive custom chassis.

What this guide covers:

  • Best-value modifications ranked by priority
  • Twin I-Beam lowering, Crown Victoria suspension, axle flip, and rear lowering options
  • Rear axle and engine swap comparisons
  • Wheel and tire fitment considerations
  • A sample DIY budget and recommended build sequence

Cost estimates are approximate U.S. dollar planning ranges, not live quotes. They vary with condition, parts availability, shipping, fabrication, and the amount of labor performed at home. The options in this guide primarily apply to 2WD trucks — a 4WD truck has a different front suspension and requires a different plan.

Best Modifications, Ranked by Value

1 · Front lowering beams or a purpose-built drop setup

Planning cost: $850–$1,050 for beams; roughly $650–$1,200 for a broader front refresh.

Retains the factory-style Twin I-Beam layout and avoids major frame fabrication. Confirm application-specific fitment, steering geometry, shock travel, and alignment requirements.

Price corrected — Oct 2026 fact-check. Earlier drafts of this guide priced drop beams at $450–$800. The reference product, DJM Dream Beams for 1965–79, lists at $1,019.34 at DJM direct and streets at ~$886–$900 at retailers — the old ceiling was below the part’s real floor. The range above, and the budget table below, use the corrected figure.

2 · Rear lowering setup

Planning cost: $150–$500 for basic parts; more if clearance work is needed.

An axle flip can produce a substantial drop. Check bump travel, frame clearance, pinion angle, driveshaft clearance, brake hoses, and shock travel.

3 · Steering and suspension refresh

Planning cost: $250–$800 in parts, depending on what is worn.

Inspect kingpins and bushings, tie rods, shocks, and other year-specific components. Repair worn parts before lowering to reduce wandering, bump-steer, and uneven tire wear.

4 · Wheels and tires

Planning cost: $600–$1,400 for a basic package.

Wheel diameter, width, offset/backspacing, tire size, brake clearance, and full-lock fender clearance must all be checked.

5 · Brake upgrade or refresh

Planning cost: $300–$1,200 depending on repairs versus conversion.

Inspect the current system and consider a compatible front-disc conversion if the truck has drum brakes. Match the master cylinder, proportioning, and rear brakes to the full setup.

Suspension Choices for a 1967–1972 F-100

A · Drop beams — retain the original suspension

Approximate cost: $850–$1,050 for beams; allow about $650–$1,200 for a broader front refresh.

Purpose-built lowering beams reduce ride height while retaining the original Twin I-Beam layout. Compatible tie-rod relocation parts, shocks, and alignment work may be needed.

Pros: Relatively straightforward, preserves original character, and avoids major frame fabrication. Cons: Keeps the original suspension architecture; steering geometry and tire clearance still matter.

B · Lowering springs and shocks

Approximate cost: $200–$600 in parts.

This can be a less invasive option where a correct, application-specific setup is available. Confirm the actual drop and remaining suspension travel for the exact truck. Ordinary replacement springs are not necessarily lowering springs.

Camber caution. On a Twin I-Beam, front ride height is camber: shortening springs without drop beams puts camber out of spec in a way alignment can’t fully correct out — DJM’s own guidance warns against lowering I-beam trucks with springs for exactly this reason. Keep spring-only drops mild (1–2″), or use beams.

C · Crown Victoria front suspension swap

Potential donor: 2003–2011 Ford Crown Victoria, Mercury Grand Marquis, or Lincoln Town Car. Approximate DIY cost: $1,200–$3,000, depending on donor condition and fabrication.

A donor front assembly can provide independent front suspension, rack-and-pinion steering, coil springs, and front disc brakes. It is not a simple bolt-in swap: plan for frame reinforcement and custom mounting, steering-column connections, brake plumbing, wheel fitment, and alignment.

Pros: Modernized steering and suspension in one project; suits a lowered street-truck build. Cons: Fabrication and engineering are substantial; track width, ride height, steering geometry, and wheel bolt pattern need careful planning.

D · Rear axle flip

Approximate cost: $150–$500 for basic parts; potentially $400–$1,000 with clearance and supporting work.

Relocating the rear axle relative to the leaf springs can produce a dramatic drop; a traditional flip may lower the rear by roughly five inches, depending on the setup.

Pros: Large stance change for relatively little money. Cons: A frame C-notch or other clearance solution may be required. Check bump travel, brake hoses, shock travel, and driveshaft angles. Never heat leaf springs to lower them.

Close-up of a factory F-100 rear leaf spring setup: the spring pack rides over the axle tube with the U-bolts strapped over the pack — the stock setup before an axle flipBefore · stock
A painted F-100 frame from above after an axle flip: at the rear wheel the leaf spring pack passes under the axle tube, so the axle sits on top of the springsAfter · flipped

The same job, on our own truck. Left: the Project ’72’s factory rear, up close — the pack riding over the axle, U-bolts strapped over the top of the springs, exactly as Ford shipped it. Right: the flip done — the axle sitting on top of the pack on the painted frame. Real photos, our frame, our hands.

E · Rear lowering springs or blocks

Approximate cost: $100–$350 for blocks; $250–$600 for replacement lowering springs.

A less aggressive alternative to an axle flip. Depending on the parts, a drop of roughly two to three inches may be possible. Use engineered components and verify pinion angle, U-bolt engagement, and axle control.

Complete Crown Victoria chassis swap

This is different from installing only the Crown Vic front suspension. A complete 2003–2011 donor chassis may provide modern front and rear suspension, steering, and brakes, but body mounts, wheelbase, track width, drivetrain, steering, and brake integration must be engineered. A similar wheelbase does not make the F-100 body a direct bolt-on.

Budget recommendation: Keep the original F-100 frame unless it is damaged or you deliberately want a comprehensive restomod.

Rear Axle and Driveline Swaps

OptionApprox. DIY parts costKey considerations
Rebuild existing rear axle$250–$800Often cheapest if housing and gears are usable.
Ford 9-inch rear axle$400–$1,200 used; more rebuiltCheck width, gear ratio, brakes, bolt pattern, and condition.
Ford Explorer 8.8 axle$200–$600 used; more installedVerify width, spring perches, pinion angle, and brake setup.
Limited-slip differential$300–$800+Match gears and carrier to the specific axle.
Custom driveshaft$250–$600Measure after engine, transmission, and axle positions are final.

A cheap donor axle can become expensive if it needs bearings, gears, brakes, or fabrication. Keep the original axle if it is healthy and appropriate for the intended power; otherwise compare a correctly sized Ford 9-inch with an Explorer 8.8 before buying.

Engine Swaps: Budget to High-End

Engine / routeApprox. DIY parts costPros & compatibility notes
302 / 5.0L Windsor$1,000–$3,500 for used engine and basic conversion partsTraditional Ford V8 and broad parts availability. Check mounts, oil pan, accessories, transmission, cooling, and exhaust. EFI adds wiring and fuel-system work.
351 Windsor$1,500–$4,000 for used engine and basic partsMore displacement and torque. Verify oil-pan clearance, mounts, exhaust, cooling, and component compatibility; not every 302 part interchanges.
4.6L Modular V8$1,500–$4,000 for engine, transmission, and basic partsA complete Crown Vic/Grand Marquis donor may supply related components. Wiring, transmission controls, mounts, oil pan, exhaust, and driveshaft need planning.
5.0L Coyote$10,000–$18,000+ for a DIY parts buildModern power and fuel injection, but electronics, transmission, fuel delivery, cooling, headers, and driveshaft raise costs significantly.

Costs above are broad planning estimates, not complete installed quotes. A running donor, included accessories, and a compatible transmission can change the total considerably.

Budget tip: If the existing engine runs well, prioritize suspension, steering, brakes, and tires before replacing it. A healthy original six-cylinder or V8 can make an enjoyable lowered cruiser.

Coyote figure corrected — Oct 2026 fact-check. Earlier drafts of this guide priced a DIY Coyote conversion at $8,000–$15,000+. Street Trucks’ F-100 Coyote cost research puts a parts-only DIY build around a used F-150 pullout at roughly $10,000–$18,000 — before the Ford Performance control pack (~$2,100–$2,730) that the swap also needs. A running pullout plus transmission can consume most of $8,000 before mounts, fuel, cooling, and wiring, so the table above uses the corrected range.

Wheels, Tires, and Stance

Three looks that suit a street truck:

  • Old-school muscle truck: 15- or 16-inch classic wheels, moderate tire sidewall, and a mild drop.
  • Pro-touring: 17- or 18-inch wheels, modern tires, firmer suspension, and upgraded brakes.
  • Patina cruiser: Original weathered paint, understated wheels, a mild drop, and a clean interior.

Planning cost: About $600–$1,400 for a basic wheel-and-tire package; premium and larger setups cost more.

Important bolt-pattern note: The stock half-ton F-100 commonly uses a 5-on-5.5-inch pattern, while Crown Victoria front hubs use 5-on-4.5-inch. If combining Crown Vic front suspension with the original rear axle, plan for compatible front and rear wheels or an engineered axle/hub solution. Wheel diameter, offset, brake clearance, and full-travel tire clearance must be verified for the actual parts.

Example DIY Budget

ItemPlanning budget
Front drop beams and compatible hardware$850–$1,050
Rear lowering setup$200–$500
Steering and suspension refresh$250–$600
Shocks and supporting hardware$150–$300
Used or budget wheels and tires$600–$1,000
Brake repairs or upgrade allowance$300–$800
Alignment and miscellaneous supplies$150–$300
Estimated total$2,500–$4,550

This is a planning budget, not a guaranteed all-in price. It assumes a usable frame, a running engine and transmission, and substantial DIY labor. A complete disc-brake conversion, frame notch, unexpected rust repairs, or professional welding can increase the total. The total reflects the corrected drop-beam price (see the note in the ranked list above).

Build Order

Recommended build sequence

  1. 1 · Inspect the truck. Check frame condition, steering-box mounts, suspension wear, brakes, rust, and the engine/transmission condition.
  2. 2 · Choose the target ride height. Decide between a mild two- to three-inch drop and a more aggressive five-inch-plus rear drop.
  3. 3 · Plan front and rear together. Confirm how front and rear ride heights will work together before purchasing lowering parts.
  4. 4 · Refresh steering, suspension, and brakes. Replace worn components and ensure the parts are compatible with the chosen ride height.
  5. 5 · Select wheels and tires. Confirm bolt pattern, width, backspacing, brake clearance, and tire clearance at full steering lock and suspension travel.
  6. 6 · Align and road-test. Check steering geometry, brake balance, bump travel, and driveline angles before regular driving.

Recommended starting build

For a budget-minded 1967–1972 F-100 street truck, start with the original frame, a moderate front drop, a carefully planned rear lowering setup, refreshed steering, good brakes, and classic wheels. Consider a Crown Victoria front suspension swap only if you are prepared for fabrication or have a trusted fabricator.

Safety.

Use rated jack stands; never work under a truck supported only by a jack. Structural welding and critical suspension mounts should be completed or inspected by a qualified fabricator. Brake and steering modifications must be properly engineered and tested before road use.

Parts list — shop this generation’s build

Built from this guide’s own sections. Links are marked affiliate slots until each retailer program approves F100 Restomod — hard parts route to CJ Creators / JEGS, tools and consumables to Amazon, donor and used parts to eBay Partner Network. Fat Fender Garage and QA1 run no affiliate programs, so they appear as name-only mentions.

  • DJM Dream Beams, 1965–79 (kingpin design) — JEGS · CJ CreatorsAffiliate slot
  • Kingpin & bushing kit (beam refresh) — JEGSAffiliate slot
  • Rear flip kit + C-notch plates — JEGS · CJ CreatorsAffiliate slot
  • Drop shocks, front & rear — JEGS · CJ CreatorsAffiliate slot
  • Ford 9-inch swap hardware — perches, U-bolts — JEGSAffiliate slot
  • Explorer 8.8 rear axle (donor) — eBay Partner NetworkAffiliate slot
  • Crown Victoria front clip, 2003–11 (donor) — eBay Partner NetworkAffiliate slot
  • 5×4.5″ wheels to match a Crown Vic front — JEGS · CJ CreatorsAffiliate slot
  • QA1 bolt-in coilover conversion — name-only mention (no affiliate program; stocked by the retailers above)
  • Fat Fender Garage chassis & parts — name-only mention (no affiliate program; stocked by the retailers above)

Two routes, like the rest of the site: new beams from the catalog, or a yard Crown Vic clip off eBay — the guide’s bolt-pattern section explains why the wheels have to match whichever front you choose.

Reference Notes

This guide consolidates the planning ranges and compatibility cautions from the F100 Restomod research. Confirm year-specific fitment and current part pricing with the manufacturer or supplier before purchase. Estimates exclude taxes, shipping, and most professional labor.