Really the thing that seems to determine reliability is compression ratios. I have a friend that has a 1992 Integra with the LS/vtec swap (B18 block w/B16 head for nuubs) and Type R pistons. It makes around 197 hp, but it breaks down every other week. Everybody I know who has problems with their modified car has them because of mods like that or turbos etc. that increase compression/advance timing. Plus, the damn thing has an SiR transmission bolted to it so when he cruises on the highway at 65 its turning at 5500 RPMs. So i dont see why a gassed or turboed engine, driven responsibly, is going to have problems.