Try to put a350 in my 88 firebird formula and keep the tpi system and don't know what computer I have is there a easy way to tell

 

It will be the 1227165 ECM. Can drop it down and look for the "service number" on the paper label. Note that if the ECM has been replaced the number may be different as GM changed it over the years (the service number for that ECM).

RBob.

 

Wouldn't the broadcast code on the eprom also be an indication?