OK. For what Chris and Joe Mopar has shown explains the timeline and the earlier question about what did '54/'57 Copars use . Older stuff from the 40s & 50s was definitely more available. But they didn't introduce the 8 3/4" rears til 1957. So that being said, the Panzers do not have these bigger 8 3/4" rears. Agree?
Now for the ratio question, If I tried to find my ratio and turned my smaller Panzer wheel and tire which is 21" tall I would get less turns of the pinion then the original 1940/1950 model car tires that were 710-15 and 28" tall (info obtained from Coker website). That 7" difference in height should answer that question. Agree?
The only other question I have is a statement from fzrs55 on these being open rearends. I have never heard this term and my mechanic buddies at the coffee shop this morning haven't either. Can you explain more clearly?