Who has best price on the Evo III airbox, (complete) & cam gear? Is it a pain to install Evo III cam gear? For new wannabe mechanic/doit-yourselfer, what do you recommend for repair manual/instructions for this and maintenance things? I know Gustave has thorough valve adjust instructions on his site (http://e30m3performance.) This is the kind of instructions I'm looking for. I really appreciate your guidance.