If it's cheap enough. Not a real sought after item. The cowl mounted booster is seen more often. This was an add on for someone who would have wanted a little assistance. Don't get me wrong, the one on my truck will lock up the wheels with little effort. Found mine in an old GMC dealership new in the box for $10.00. The guy just wanted to get rid of it. Only later did I find out that 63 Chevrolet had their own version.
Chevrolet Version
