I need help! My engine is knocking is it is the lifters. I`m going to replace them, but my aly thing is that the rocker arms. Do they need to be trouqed or could I just use a stock to put them on or do I need a trouqe renach. Could I buy high rev lifters or the stock ones. I`m going to keep everything stock, cam, valves, etc. Which ones could be beater. And can even one give me some tips and how to do this. I was going to take it to a shop, but they be charging to much. Please help me out guys.