Fast ratio pitman arm

The fast ratio arm is longer. It was used on the AAR Cudas and TA Challengers- curiously, with a standard length idler arm, which caused some wonky geometry changes as it cycled through it's arc.
Repro fast ratio arms are offered with a complimentary length idler arm to correct this.
Think twice about using them on an A body, they bring on header clearance issues. It's been done, but it takes more than a few dings in the tubes in most instances.