I am currently in the process of rebuilding my 152 engine out of my 63 Scout 80. The problem I am having is with the endplay on my camshaft I installed the rear plate with gasket then the camshaft and then the front thrust plate. My book then says to check end play looking for around .006 but I can move my camshaft a full 1/4" forward and backward so am I missing some kind of shim or did I do something wrong? Any help would be greatly appreciated. Also it is worth mentioning that I have rebuilt a handful of engines before. Thank you