You shouldn't have to. Just use a 904 slip yoke and the parts i listed and check for the length it will work. I have to shorten mine 2 inches. Its (~was~) a slant six car 1975 year now its a 360 with a 904 and 8.8. The 8.8 case is longer than the 7.25 that's why its gonna have to be shortened. You can shorten it yourself if you can weld and keep it straight.
