Question: LS1 -LS3 swap

[Best Vette Yet]

I have a 2003 manual coupe corvette. Are there many implications in doing an engine swap out from an LS1 to a LS3? My question concerns compatibility between the existing 2003 Corvette ECU, wiring harness etc. I have access to a new LS3 crate motor, zero miles. Is this motor also compatible with the existing 2003 drive train, engine mounts etc? Any ideas anyone? :confused;help

 

[catbert]

Rule number 1 for swaps - It's never as easy as you think it will be.
Rule number 2 - see rule number 1

Sorry, that's a stupid old joke, but I couldn't help repeating it.

A LS3 C5 sounds like a really nice package. Good luck - I'm sure someone here will have a more constructive comment than mine. Let us know what it entails, and how it turns out.