at first i wanted to stay all ls but after my block rebuild i was amazed at what a piston job can do. my motor pulls awsome through-out all rpm ranges. but top end isnt the greatest but then again, ive beated plenty of b16 rex's hatches and a few other i really shouldnt have beaten. that why im gonna go vtec instead of building my head. theres nothing live vtec especially in a rex. good luck with the build and mayve whn i get my done we can go at it.