What is the difference between a CCF 331 posi and a CRV 331 posi?

I'm certainly not an expert on 70's Joe, but I believe one code was for the 396's and one was for the 454's (don't know which is which). Seems to me I remember reading that the 454's had specific codes. Hopefully a 70 guru can jump in here and be more specific.

I know one difference is the yoke. The CRV rear is from the 454 cars, and it has a yoke that accepts the larger 1330 U-joint. 396 and down cars with 12 bolt rears got the yoke that accepts the more common 1310 U-joint (unless you had an L78 car).

Yep, it's the yoke. I guess the yokes' on you.... :D