I have a 505 stroker with mildly ported Eddy heads. The block has been decked ands heads shaved to a true 10.5:1 compression. I am using Comp mechanical roller lifters, #929 springs, and Harland Sharpe 1.5 rockers. Automatic tranny in a 70 Cuda with 3.55s at the moment. Loking at Comp 308/308 .575/.575. Any other suggestions for a custom grind?