i read the info on Mantons site, i will double check my clearance while assembling the engine this time, but yea its rubbing VERY little, and even at that, its only on the intakes and all its doing is putting a slight polish on the pushrods. I remmeber having smallblocks that had the large cork gastkets rubbing the pushrods and that left more of a mark on there than this...Thanks for all the replies