thanks now that is what i am looking for. what block was the 572 built around that had main webbing or cap problems? I didn't realize your current combo runs 24 lbs that's pretty stout. And I did take a close look at the block today it gets a little too tight for the 1/2 stud. Once this motor is dialed in though I do want to turn it up and see what it will really make I am hoping it will make north of 30lbs maybe up to 35lbs.