Re: Picked up an LT5 and ZF
1990 has a couple things different..
Power key circuit and wire location on the ECM as well as the Knock sensor control. 1990 is external, 1991 is internal..
Concerning if the ECM Manufacturer cannot tell you about that or even have it listed in their own notes
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1990 Corvette ZR-1 #1051
Watson Headers (2" Primary) - Flowmaster Cats - Borla Catback
Late Model IH - Plenum
Coilovers - 4.10s
Shelby Series 1 - Wilwood Brakes
Custom Interior
NCM Lifetime Member #978
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