From what I've heard the x303 cam specs out at 224/224 dur @ .050", with an LSA of 110 right? What do you guys normally setup the intake centerline at? How much do you guys normally advance the cam in the block?
My old camshaft has a centerline at 102* and my new setup is set at 106*. If you chose the correct cam you should not have to advance or retard the cam. It will just move your powerband. FWIW ther are better cams out there than the alphabet cams.