Originally posted by Denny Graham:
can you use a 3.something ring and pinion in that newer carrier???
I've heard that there is a 3.9 or 3.7 gearset available, but its rare and hard to find. It wasn't used very many years and was little used in those years.
If I knew the details I'd share them. Some searching here is likely to turn up more information. What you are looking for is a late 60's early 70's C-20 with an automatic. Big block suburbans seem to me the most likely place to find them.
It might be less trouble to swap rear axles.
