At one tine I was thinking of doing the caddy motor but the Chevy is alot cheaper to buy parts for. Another thing is parts availability. If you brake something on the trail chances are better that someone will have The part to replace it. Also was thinking of a TPI L98 vette motor, but the TBI is super simple and could careless if it sucks up a speck of dust. The TPI don't likeee dust....Dean