Hi again guy's. I'm back for somemore info. And I want to thank everyone who has taken the time to help me in the past. Especially 'Streets' Anyway has anyone ever heard of 'Rhoads' lifters. or 'ROADS'. Iv'e never heard of them, but this engine that I picked up, is suppose to have them. I was told that they where used because of the big cam that's in it. I was told that at idle and low to med rpm they stay kinda soft. And then at high rpm's they get real hard and act like a solid lifter. I guess it add's a few degrees advance for a little more 'poop'. It kinda makes sence to me, but I'm not sure. Thanks again