Donald Farr
Former Editor, Mustang Monthly
April 24, 2007
Photos By: Mustang Monthly Archives

RRS Struts Its Stuff
While most aftermarket suspension systems rely on a double A-arm-style configuration, RRS has taken a couple of steps beyond traditional. Instead of late-model or original-style spindles, RRS uses a custom spindle, designed using cutting-edge suspension theory and CAD com-puters to give vintage Mustangs improved handling characteristics with better tie-rod placement and superior camber shift (zero camber at full suspension droop and negative camber at full compression), as well as less unsprung weight over the axle. The spindle utilizes a sealed bearing assembly that never requires greasing and is replaceable at any parts house. The system maintains a stock wheel offset for correct vehicle tracking and allows stock or aftermarket lower control arms. The RRS hub requires post-'67 wheels with a 2.9-inch center opening.

With RRS's MacPherson strut assembly, owners can adjust ride height via the spring using the supplied wrenches without affecting camber due to the ample camber adjustment. Tailor-made for performance, the MacPherson strut maintains zero or near-zero to negative camber through its range of motion. The lack of camber changes make for more neutral steering characteristics and a meatier tire contact patch during hard cornering. The shock inserts are top-adjustable using the supplied screwdriver and are replaceable at most automotive retailers.

While the system is available without brakes, RRS offers a complete line of brake systems. Phase 1 (pictured) uses an 11.25-inch iron rotor and single-piston caliper. Phase 2 through Phase 4 systems come with a new type of rotor developed by Molycarbide, featuring NASCAR-tough technology and metallurgy. Phase 2 features an 11.7-inch Molycarbide rotor and dual-piston caliper with braided brake lines. Phase 3 also packs a dual-piston caliper but mounts a 13-inch rotor. Phase 4 has a Brembo four-piston caliper and a 13.6-inch thermal-stability Molycarbide rotor. Phases 1 and 2 can use 14-inch wheels, while Phases 3 and 4 need 16-inch wheels or larger.

The RRS strut kit works great with the company's rack-and-pinion, but it'll integrate with stock steering or other rack systems.

SuperRide II
New from Heidt's Hot Rod Shop is the SuperRide II independent front suspension for '65-'70 Mustangs. A true coilover suspension for the ultimate in ride and handling, this kit comes with full front-frame boxing plates, tubular arms, dropped spindles, rack-and-pinion steering, 11-inch brakes, and coilover shocks with chrome springs. Available options include polished arms, larger brakes, black or red calipers, a power rack-and-pinion, a sway bar, and stainless tie-rod ends.

Totally Coilover
The Ron Morris Street Force tubular coilover front suspension from Mustangs Plus improves the handling and ride of vintage Mustangs by moving the lower mounting point of the coil spring and shock absorber to the lower control arm. By positioning the spring and shock closer to the wheel, less spring rate is needed to support the vehicle's weight, allowing the use of lighter-rate springs and shock settings for more suspension travel and improved ride quality. The Street Force suspension also offers improved geometry, adjustable ride height, and replacement ball joints. Available for '65-'66 and '67-'70 Mustangs, the system features QA1 shocks and simple bolt-in installation. A track version is also available.

Control-Arm Relocation
The Upper Control-Arm Relocation Kit from Rancy Manufacturing is an affordable, do-it-yourself modification that improves cornering on '65-'70 Mustangs. The kit includes an aluminum template for positioning the new bolt holes, similar to the Shelby modification for '65-'66 GT350s. Also included are instructions and a pair of aluminum wedges to eliminate the bind created on the ball joints. Kits are available for 1-, 1-3/4-, and 2-inch drops.