I am putting together my 400 last week. I got the whole bottom end together just to realize that the cam lobes of no. 2 and no.5 contact the connecting rods. I thought it wasn't going to be an issue because I bought capscrew style rods?.... Anyway I had the whole thing balanced. I talked to the machinst, he believes that, as long as I do all of them equal it shouldn't need to be rebalanced. How much, if an, off the current weight should I be worried about?