after this summer im going to have all the bolt-ons and will be getting ready for some more serious mods. im going to build up the engine and upgrade the turbo. well i wanna know some things. first, what are some good places to look into buying a built motor? second, are there any alternatives, for example just picking up pistons, rods, and arp head studs? what things in particular should i keep an eye out for when shopping around for parts and building the motor. thanks alot in advance for any help.