Hey All
We just bought our first 85 iroc it has a bad motor 305 tpi. We are wanting to install a new 350. What will we need to do and how crazy can we get with cams compression etc.Any help? Thanks!

 

Main thing about 85 TPI is the ECM is crap. So you are not going to able to find a 350 prom for it and you will one. So anything esle I will say is a waste of time.

 

if you plan on leaving it stock, you will need to upgrade to 22lb injectors. if you go with a cam, headers, and pistons, id recomend 25lb injectors. you will need to find someone though who will do a custom tune as no ecm will figure that work out. im in that same boat right now