Im putting in Windsor Jr. Heads and the comp Exteme .555/565 lift. Im also replacing the springs with some crane ones that can handle the lift. What I want to know is if Im going to have piston to valve clearence problems???? Is there anyway to check for this a easy way? Please help.
There is no way to know for sure whether you will have piston to valve clearance issues without checking it manually. The peak lift is not what you need to worry about. It is mainly the duration that may give you the problem. Do you have stock pistons? Having larger valves than what the walve reliefs are cut for will also reduce the clearance you have. The best way to check it would be the clay method. Read up here for some info about it: http://www.geocities.com/jjonibones/PVC.html