what i have is a 1975 cj5 with a 304 and a t18 dana 20 combo, i pulled the tranny out of it and want to install in my wrangler which has a fresh amc 401 in it, now when i go to buy a new clutch kit and bushings can i say 401 or 304 are they different in size as far as fitting in the crank, i know the input shaft sizes vary from different trannies!