Aubrey ,You can get Manley to make valves on there Gen2 custom stainless blanks.Also look at how much coil bind clearance you have ,too much may cause spring bounce or surge.We agree with Billy Nees and others ,the headers are probably to big.We see engines that get The National Dragster Tune Up ,Big headers,Big carb,bag of ice on the manifold and take 2 quarts of oil out
.Bill C.