I am putting together a 5.9 magnum for my Dart. Stock bottom end with EQ heads and Hughes springs. Doug's headers. It will have 9.25 compression, I have an Oregon cam 1357 to put in. I degreed it as installed at 108. I am wondering if I should install it advance 4 degrees? It has 26" tires, 3.73 gear, 904 transmission with 2800 stall. Thanks.