1984 ECM Upgrade

[MyFlaVette]

I am in the process of building a 383 for my 84 coupe and I am fairly sure that I'm going to have upgrade my computer. Does any one know if the ECMs are interchangeable with any year C4, or am I going to have to change out the wiring harness as well? Any other suggestions or recommendations would be appreciated.

 

[vetteoz]

Are you keeping the CFI intake ?
Most upgrade to a late model TBI truck ECM

 

[WhalePirot]

Are you keeping the CFI intake ?

That'd be interesting, given the increased air demands for the 383. With no good alternatives I switched to what you see below, having my harness professionally modified for the '90 Camaro ECM that sits in the stock place. The 1990 is one of two years C4s used a speed density system.