904 to 727 upgrade.

Its been pretty well covered. You'll need a 727 converter, possibly a flexplate, dust shield, new/modified cooler lines, yoke, have your existing driveshaft shortened locally. It cost me under $100 to have mine done with new u joints and balanced. Its an easy and straightforward swap.


Now the bad news... I would run like hell from that TCI trans. I had a trans built by a well known mopar builder. He swears by TCI parts (he is a dealer and gets discounts) and put a TCI clutch/seal kit, and a TCI valvebody in. That trans made it about 20 miles and destroyed itself. He rebuilt it again under warranty. It made it about 5 miles and started dragging, bogging, not shifting, etc. He refused to do anything about it.

I pulled the trans out and rebuilt it myself in my garage without any fancy tools. I instantly had issues with the trans. So I pulled the valvebody out and swapped in a Cope valvebody. I havent had one single issue since. That trans has taken plenty of street abuse and several 1/4 mile passes at mid 11's. I still have the $400 TCI valvebody in my garage. Its absolute JUNK. It somehow someway was slowly leaking fluid and engaging the low/reverse band while in high gear.