Ok I bought a 749 off eBay and started collecting things to read about it and found a thread about a guy having hard time with a bunch of conveluted spark table, which is problem I'm having with 707. Lots of spark tables and lots of problems with spark.

Anyway I compared the wiring diagram from 1989 sunbird gt turbo to my 1990 grand am 707 and only diff I found was waste gate wire where 707 has a/c wire aldl wire one pin off fuel injector control had one wire down on diagram and 2 other wires were different but all wires were only 1 pin away except a/c control.

Does this mean mean I can use a 707 with same masks as 749 or just a coinsidence??

Im always grateful for any help!!!
Thanks everyone