The original block I started with was a Mega block which I had to clearance a lot. Will have to see when the world block and new rockers arrive. I sure hope the T&D rockers are in stock and ready to ship. Not much good about this whole messed up deal other than I do get some more dyno time testing the new engine. I'm not expecting any more HP from what I started with but will be interesting to see. new good solid block 1.6 rockers the other camshaft I have.