Update... I was up at John Arruzza's shop on monday. 'Carried the new manifolds with me and we decided to check the fit on one of my heads. All the holes will need to be slotted .150-.200. Core shift or what? Who knows about the pipe flange. Also Arruzza had bought roller lifters for my engine months ago. He happened to figure out the tie bar on Crower lifters hits the lifter boss on the block before it even touches the lobes. Mopar keeps making that area bigger on the blocks and it's not a world block either. He finally found a set of Isky lifters that will work, but more $. The repro industry definitely needs to get on the ball here.... Whether it's engine blocks, exhaust manifolds, seat foams, or sheet metal there are too many high dollar parts being sold that DON'T fit.