Could someone explain this please ?? Also where would one get the parts ? I have been debating on wheather to try a shot of rebuilding my C4 out of the Ranchero or just go with a TCI street fighter . Thanks!
Most of the guys on this site that are rollerizing and modifying C4s are machinist or have cheap access to someone who can do the machining. If the machining isn't a problem for you, then go ahead and do your own.
If you don't have access to machine tools, you can buy most of the parts already machined and ready to install from Jay at broaderperformance.com. He has a good reputation for customer service. You can also buy a complete trans from Jay at about any level you want.
Either way you go you will have a better product than anything TCI can offer. The street fighter trans is not much more than a stock rebuild with a shift kit from what I've seen.