Never heard of "McGurdy"- - - - -might that name actually be "McGurk"? That company built race parts for stovebolts back in the Dark Ages, and I'll bet that roller cam will be totally unsuitable for anything other than wide open competition at RPM ranges a street engine will seldom, if ever achieve. I'm in the process of adapting a stovebolt engine to run roller lifters on a Corvette/261 cam- - - - -no idea yet if it will work at all, or if it will provide any kind of performance improvement!
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!