I dont think my boat is running the correct rpms for my setup. I have a fresh jacuzzi wj w/ an b impeller snd a 460 bored .030 with keith black dish pistons. Ported d0ve-a heads, stealth intake. Trick flow pushrods with comp roller rockersCrane 288 commander cam. 850 dp. Msd distributor with a msd box. It only turnd 45-4600 rpm max. Problem id I was turning that before when it was stock. I have swapped tachs already. What could be the problem? Camshsft timing maybe?