best cam guy out there

who is the best person out there for mechanical roller cam advice ? build you a cam ? and it will make the best cam for your 500 cubic inch rb ???? go !!!!!!!!!!!
Duane Porter, he's on Moparts as Fast68Plymouth. He's got a top notch rep as a head porter and cam guy. Brian @ IMM, IIRC he's OU812 here is another builder that I'd talk to, he built my current engine and I'm happy with it. HTH, Steve