Anyone working on a classic first-generation Ford Bronco spanning 1966 through 1977, with a rusted-out chassis, will appreciate what the Roadster Shop is showing off. The company has a bunch of renderings of its new RS4 Bronco chassis that brings everything the classic SUV needs. The RS4 is a complete, bolt-on four-wheel-drive chassis that is a direct fit for the first-gen Broncos.
The chassis starts with Roadster Shop’s proven laser rails and was engineered with the best components available. It uses Currie Dana 44 front and Dana 60 rear differentials tied to the chassis using triangulated four links designed to optimize anti-drive, anti-squat, and suspension articulation. Massive xAxis flex joints allow increased misalignment, longevity, and performance over the more commonly used spherical and Johnny joints.
the suspension used consists of Fox Racing 2.5 Factory Race Series coilovers with valving specific to the chassis. The goal with the suspension was to provide ride quality on and off-road. RS4 buyers get a chassis that is CAD optimized for steering geometry to eliminate bump steer and laterally control the axle.
The 5-inch x 2.5-inch .188 wall frame tubes of the RS4 Bronco chassis are stronger than the Ford factory parts and offer an extra 3.5 inches of width. A wider chassis means that it’s much easier to get modern power like a 5.0-liter Coyote V8 into the chassis and provide simple header and steering routing. All popular classic and modern combinations have standard mounting provisions available.
The RS4 Bronco chassis also has an optimized ride height to eliminate the need for body lifts for larger wheels and tires. The chassis is configurable for uncut original rear-wheel openings or popular bolt-on flares. There are options offered for the chassis like 7075 billet arms, and Fox Bump stops among lots of others. Pricing starts at $36,495, and options can go up significantly. This would be the perfect chassis for something wild like Jay Leno’s GT500-powered first-gen Bronco.
Source: Roadster Shop