The wiring is different between the 60 and 80. There are people who have made it work, do a search in the conversions and hybrids forum, there is a thread over there that says what wires need to be re-arranged on the transmission connector.
__________________ 85 El Camino SS
black and silver, factory buckets. 6.0L/4l60E 3.73 posi. Down for rebuild 2005 CTS-V
Stock...for now daily driver 1985 Monte Carlo SS
5.3L/4l80e/turbo still in pieces. www.fquick.com/G-Body
Originally Posted by Rodder
"possible" is a relative term around here... anything is possible. It's "possible" to put a whole K3500 4x4 dually truck rolling chassis under a brand new Mini body. Is it reasonable? No. Does it make sense? No. Is it possible? Yes.