Taylorman:
Im rebuilding my 455 and am wondering if I should use a windage tray or not. One person told me that it could break. Has anyone had this happen and should I use one or not? I haven't heard about windage tray breaking in cheby motors. Are you planning on running at WOT for long periods of time? They are designed to keep oil down in the pan instead of all over the bottom of your pistons at high rpms.
I think that the most important thing you do if you are rebuilding your Olds, is to fix all the oiling inadequacies.