cruzer67
Member
I have a "489" case with an open 2.70 ratio installed in my 1967 GTX. The original setup was likely a "742" with 3.23 gears and a sure grip. Should I just install the 3.23s and sure grip in my existing case, or should I continue to look for a "correct' case to keep the car more original? It's unlikely I'd find a correctly dated case anyway.