If you are running modern radial tires you should not follow factory alignment specifications for caster, SPC recommends 3deg of caster to promote return to center steering. Stock strut rods on the 1st generation Mustangs are non-adjustable and often haveworn bushings that can cause unwanted movement of the lower rod assembly and poor handling. A must for early Mustangs, SPC's adjustable caster rod features low durometer OE-style bushings to protect the chassis mount from damage and has easy caster adjustment. It will provide the positive caster needed for improved tracking and modern geometry. If you want to adjust camber as well, look at SPC control arm kit # 94215. California Residents WARNINGThis Part Fits: Year Make Model Submodel 1964-1965 Ford Falcon Base 1964-1965 Ford Falcon Futura 1964-1965 Ford Falcon Futura Sprint 1964-1966 Ford Mustang Base 1965-1966 Ford Mustang Shelby GT-350 1966 Ford Mustang Shelby GT-350H 1964-1965 Ford Ranchero Base 1964-1965 Mercury Comet 202 1964-1965 Mercury Comet 404 1964-1965 Mercury Comet Base 1964-1965 Mercury Cyclone Base
