The cam isn't getting the valve open that far is all. The heads aren't doing much around .450 lift. You could choose a lot better cam grind and have probably 20-30 more hp alone and not sacrifice any low end power.
I was thinking that also. I was thinking the 20-227-4 cam . Mine is 230/236- .488/.491.
The 2274 cam is 231/237- .525/.525. So a little better lift. A guy on YouTube has almost the same stuff I do and he is at 420hp I think. Plus he has out of the box eddy heads. Since mine is all new- I will do that later lol.
