Well from my studies on these transmissions the 700R4 was only the first offerings in 82-89. After that they called them 4L60's until they went to full electronic controls then they became 4L60E. Wiki says they were renamed the 4L60 in 1990 (my trans). Yea I have read they still have kept the 700R4 name for a while too. Beater, I have a Astro van ECM right now but I do not remember the number. I bought a S-10 harness off eBay last year that was from a 4.3L 5 spd truck. Every thing is there except the lock-up wiring. I have been studying the blow thru TBI stuff on the net and will keep the GM ECM until I get the Brazilian head from Edy in Brazil for a Chevy II wagon build I want to do.
Randy S. Hager
Venus, TX
