prom tuning help

[ECMnut at aol.com]

Are you absolutely sure on that number?
I show that it could be a 8746 ecm w/no equiv #.
MV

> A friend of mine has a 1990 firebird that was originaly a 305 tbi.
>  Now it has a 350 with a ZZ3 cam. He is trying to sell the car 
>  but it idles like crap. The ecu is a 7746, I checked on Ludis Langens
>  home page and found that this ecu is found in a 1987 S10 with a TBI
>  4.3L V6. Did GM also use this ECU in the cars, he's the original owner