Sorry if this is a common issue but looking for advice. Start off my truck broke a rocker arm and bent 2 push rods. I replaced all rockers and rods. Put it back together and was skipping. I replaced the plugs. Still skipping. Turns out push rod jumped off the rocker. Fixed that. Runs good now but has a tapping noise now. Tore the motor down to the lifters. They all look good. Cam looks good. So I'm thinking its deeper. This is the 2nd motor in this truck. Thinking its another spun bearing. Stock bottom end, heads, cam, intake, headers etc. Its putting down damn near 450 at the wheels when running!. I bought the truck from my brother who had all the work done to it and he was telling me about a 370 you can buy with all forged internals. Don't have a lot of money to drop in it right now as I'm building a camaro to. Any advise would be greatly appreciated!!!