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Hello I am new to the forum. I have a question for Moses Ludel. Moses my uncle and I have rebuilt a 505 performance 4.6L stroker due to the main, rod and cam bearings worn out prematurely. The motor had roughly 12,000 miles on it before I loss oil pressure and upon tear down noticed the bearings were worn out. We have since rebuilt this motor, utilizing a new scat crank with all new bearings and rings. The block was vatted and did not require the cylinders to be oversized but instead a light hone was done. We chose a complete Comp cam kit (68-232-4) we were not able to use the valve springs from this kit due to the retainers not fitting the valve stems correctly. So we used the existing springs that were used with the 505 Performance cam which was the (266/272-14H). We just fired this motor up yesterday for the break in process and the lifters will not prime up and the top end rattles. In addition we seem to have a timing issue (popping at the exhaust above 1800 rpm). I am kind of at a loss on what our issue is. Any help would be appreciated, Mike