600miles isnt a lot. I know a guy that put over 6000kms on his boosted cat in one season... Linderman built motor. Took it apart still looked good. You wanna run pump gas well that's up to you.Buddy in fortine mt runs a sled shop, I seen last year he had a old 670 turbo kit laying in a box, if your looking for another
i ran last year on pump fuel 600 miles and had no issues, and with out a intercooler...and ran very well, now that I have done some thinking, I feel I was lucky but also now know that it can be done and done safely