Originally Posted by Jimmygun911
I Rev the enging and it will go away for a couple seconds when I hit 2500-3000 rpms. The hits idle and starts again. I have new lifters coming, and thinking about getting heads cuz I was thinking a bent valve
If you have a bent valve, then you may be beating the crap out of the top of your piston(s) and the valve seat and head.
If it goes away when you rev it a bit, then I would suspect that you have a lifter that is collapsing at lower oil pressure.
Since you are replacing them, you will be able to see if that was the problem.
You might want to try and get a look into the cylinders and see if you can see any dings in the tops of the pistons. If any local mechanics have a borescope, that would make doing that much easier.