yeah i can understand the mileage part, i get about 10 now:/ but my Uncle has a 5.3 bored to a 5.7 with a custom ground cam from i wanna say.... Eddie Lane over here in North Huntsville. Apparently Eddie knows his stuff its a meeeeaaaann machine. He does LS kits for rx7, s2000.. etc. Gonna see what i can get as far as deal wise. All im looking for is a STOOOOPIID fast truck, maybe a sleeper who knows.