I was wondering how hard it might be to retro fit the tpi intake off of a 88 iroc to fit a crate engine set up for carb. has anyone got any info or done anyhing like this?

 

If the crate engine has centerbolt valve cover heads like those used on an 88 TPI motor it's just you're basic intake swap. If the heads on the crate motor are different (early 85-down bolt pattern) or later Vortec-style heads, then it's a different story.

 

What Damon said. We need more info on the motor you're going to use.