Im doiung a smog conversion, rules require me to use the same computer as a 1500 pickup, or ss Blazer, or any car that came with a TBI 454(L19). I picked up the one that came with the motor, its a 7747from a k30. Did the light duties use the same?

Charlo

I dunno the answer, but you might want to try over at the DFI & ECM board. Joby's got all the answers :lala:

My 454SS uses the '8747 computer.

I guess I should mention that my truck is a '90. The '91-'93 used a different computer.

Thanks go faster and 92rs. Thats what I need then is the 8747.

Were those used for the 350 and 305s also?


Charlo

They used the 7747 with the L19. I have a couple 7747 bins for the 454 so they had to have done it at some time.