I agree on trying less lash. I would start by tightening the exhaust by .010 to .012 to see if it likes it. The converter is a bit tight, but the cam isn't so radical it won't work ok. I wonder how this cam would respond to Beehive springs and higher ratio rockers, just a thought. If you have old super stock rockers, some were short on the stated 1.5 ratio I believe, might as well check them and see.