Buying a 1966 Ford F100: Complete Buyer's Guide

Why the 1966 Ford F100

The 1966 is the last year of the fourth-generation F100, and it sits in a sweet spot that appeals to builders and drivers alike. Ford introduced the Twin I-beam front suspension in 1965, and by 1966 it was fully sorted — giving these trucks a ride quality that earlier solid-axle models cannot match. The styling is clean and purposeful, with a squared-off cab that looks modern enough to blend in but classic enough to stand out.

As the final year of the generation, the 1966 received all the incremental improvements Ford made during the 1961-1966 run, including the 352 FE big block option and refined cab ergonomics. It is also one of the most popular restomod platforms — the Twin I-beam suspension accepts modern upgrades well, the cab dimensions work with a wide range of engine swaps, and aftermarket support is extensive.

What to Look For

Start with the cab mounts. Fourth-generation F100s are body-on-frame trucks, and the rubber cab mounts deteriorate over decades. Worn cab mounts allow the body to shift on the frame, which cracks the cab at the mounting points and stresses the sheet metal. Inspect the mounting areas from underneath and look for cracked or collapsed rubber bushings.

The frame itself is generally robust on these trucks, but check the areas around the leaf spring mounts and the rear crossmember. Surface rust is normal, but anything beyond surface scale needs investigation.

Inside the cab, pull the floor mats and check for rust in the floor pans, especially under the driver’s seat and along the firewall. The cowl area below the windshield traps water and is one of the first places to rot. Check the lower corners of the doors and the bottoms of the fenders where mud collects.

Under the hood, the 240 and 300 inline sixes are bulletproof engines that run forever with basic maintenance. The 352 FE V8 is a strong motor but drinks fuel and is heavier on the front end. Check for oil leaks at the valve covers, timing cover, and oil pan. Listen for valve train noise — worn rocker arms are common on high-mileage FE engines.

The Twin I-beam front suspension should be inspected for worn radius arm bushings, loose king pins, and tired coil springs. These components are all replaceable, but neglected suspension makes the truck wander and ride poorly.

Common Issues

• Cab mount failure: Deteriorated cab mounts are nearly universal on unrestored trucks. Replacement mounts are inexpensive, but the labor to lift the cab and install them is not trivial.
• Cowl rust: Water collects in the cowl plenum and rusts through to the interior. This is one of the hardest areas to repair properly.
• Floor pan rust: Standard issue on any truck this age. Patch panels are readily available and affordable.
• Twin I-beam bushing wear: The radius arm bushings wear out and create clunking and wandering. Polyurethane replacement bushings are a popular upgrade.
• King pin wear: The 1965-1966 Twin I-beam uses king pins rather than ball joints. Worn king pins cause tire wear and loose steering. King pin kits are available but require a press and some mechanical skill to install.
• Wiring harness deterioration: The original wiring harness becomes brittle after decades. Full replacement harnesses are available from companies like Painless and American Autowire.

What to Pay

The 1966 F100 offers strong value compared to the second-generation trucks.

• Project trucks with rust, mechanical issues, or incomplete components: $3,000-$12,000. At the low end you are buying a rolling shell. At the higher end you have a complete truck that needs work but has potential.
• Drivers that run and can be used as-is: $15,000-$25,000. These are trucks with decent paint, running drivetrains, and functional interiors. Some cosmetic issues and deferred maintenance are expected.
• Restored or restomod builds with professional-quality work: $30,000-$40,000. Well-executed restomods with modern drivetrains, upgraded brakes, and quality paint command strong money.
• High-end builds with LS swaps, custom interiors, and air ride can exceed $40,000 but the market for these tops out lower than comparable second-gen builds.

V8 trucks bring more than six-cylinder models, and short-bed (Styleside) trucks are more desirable than long-beds for most buyers.

Where to Find Them

Fourth-generation F100s are still relatively plentiful. Facebook Marketplace is one of the best hunting grounds for project trucks and private sales. Craigslist in rural areas, particularly in the South and Southwest, regularly turns up trucks that have not been picked over by dealers. Bring a Trailer features higher-end examples, and Hemmings carries both project trucks and finished builds.

Local swap meets and Ford truck shows are productive, especially the larger events like the F100 Supernats. The Ford Truck Enthusiasts forum has an active for-sale section where knowledgeable sellers list trucks with honest descriptions.

These trucks were produced in large numbers, so patience pays off. Do not rush into the first truck you find — another one will come along.

Final Verdict

The 1966 Ford F100 is one of the best values in the classic truck market. It looks great, rides well thanks to the Twin I-beam suspension, and has enough aftermarket support to build into nearly anything you want. It is an excellent choice for a first classic truck or for someone who wants a restomod platform without paying second-gen prices. The truck is not for you if you want the rounded, organic look of the 1950s trucks — the fourth-gen styling is more angular and utilitarian. But if you want a truck you can drive, build, and enjoy without breaking the bank, the 1966 deserves serious consideration.

Frequently Asked Questions

How much is a 1966 Ford F100 worth?

A 1966 Ford F100 ranges from $3,000 to over $40,000. Project trucks needing significant work run $3,000-$12,000, drivers in usable condition cost $15,000-$25,000, and restored or restomod builds with professional-quality work bring $30,000-$40,000. V8 trucks and short-bed Styleside models are more desirable and command higher prices.

What should I look for when buying a 1966 Ford F100?

Start with the cab mounts — deteriorated rubber bushings allow the body to shift and crack at mounting points. Check floor pans for rust under the driver’s seat and along the firewall, and inspect the cowl area below the windshield where water collects. On the Twin I-beam suspension, look for worn radius arm bushings, loose king pins, and tired coil springs.

Is a 1966 Ford F100 a good investment?

The 1966 F100 offers strong value as one of the most affordable classic trucks with serious build potential. It is the last year of the fourth generation, featuring the refined Twin I-beam front suspension and available 352 FE big block V8. Prices are rising as the earlier generations become unaffordable for average buyers, making it a smart entry point before values climb further.

What are the common problems with a 1966 Ford F100?

Common issues include deteriorated cab mounts causing body shift and cracking, cowl rust from trapped water that is difficult to repair, floor pan corrosion, Twin I-beam radius arm bushing wear creating clunking and wandering, king pin wear causing tire wear and loose steering, and brittle original wiring harnesses that need full replacement.

What engine options were available in the 1966 Ford F100?

The 1966 F100 offered the 240 and 300 cubic-inch inline sixes, which are considered bulletproof engines that run nearly forever with basic maintenance. The 352 FE big block V8 was also available, providing strong power but heavier fuel consumption. Worn rocker arms are common on high-mileage FE engines, so listen for valve train noise during inspection.