I have a 83Z, just bought a 88 Iroc 350 wiring harness to convert to tpi. are all 88 ecm's the same and just a different prom? or do i need the actual 88 350 tpi ecm? Thanks,scott

 

Maybe this will help you. https://www.thirdgen.org/ecminterchange I'm sure this has been answered before also. Do little searching and you will find many conversions. By the way this is Jason

 

Assuming you are doing a MAF TPI setup ,a 165 ECM from any 86-89 TPI car will work .
You will need a 350 MAF TPI prom and knock sensor

 

Just picked up 86 ecm. Has anyone ran one of the holley stealth rams yet? thats what im leaning towards. they tested it on a 3rd gen with a stock 350 prom, a mild comp flat tappet, and 3.42 gears and it ran high 12's. Thanks for the info, its greatly appreciated!

 

Here's a entire list of posts dealing with this https://www.thirdgen.org/forums/sear...archid=4303175 there is also probably more remember that search is or could be your best friend. If you think of a combination odds are some people have already tried it and posted it. By the way you have two 350's right? do they both have L98 heads and are you thinking of selling?

 

i have two 350's, one is out of a 88 iroc with roller cam with factory iron heads, and the other is a 91 with vortecs on it. sorry i dont have the L98's. thanks for the wisdom!!

 

Will you be selling one of them. The 383 I was going to build had vortecs on it you can make 400 HP with vortec 350 and a little work.

 

were are you in northern NY? i would probably sell one.

 

You bought that wing from me?