During the build we experienced a prime example of the conflict that sometime occurs when one killer part comes to be long before another killer part is developed. In this case, the problem centered around the height and thickness of the billet camshaft caps on Trick Flow's heads (greater than the stock girdle) and the Moroso valve covers, which were designed to directly replace factory covers. You can't just grind away here, as each cover features a machined-in channel for a stock-style gasket and damaging it will result in instant oil leaks. A.R.E. has the fix for this and can modify your Morosos for perfect leak-free fitment.