Hey Everyone....I'm doing a little work to my Buddy's AMX for him and was looking for a place to ask a few questions if needed. I've been a Ford guy since I was little helping my Dad...but love all Musclecars. My friends AMX is a 69 390 4speed with go pak and rally option..it is an original car with original paint/interior/etc....Very neat car, I like driving it alot but he has to sell it before he moves this spring.

Is there anyway to tell trany ratio's, rear diff ratio's are they all the same on gopak cars? Also I read somewhere that the build sheets might be in the car from the factory...is there any truth to this and if so where might it be, under the carpet?(thats where fords are)

Thanks...any help would be greatly appreciated!!!!
Dave