I'm in the middle of rebuilding my first engine. It's a 1960 IH. I'm getting ready to replace the cams and through reading the manual I'm getting ready to check the end play. Now I read on here that you shouldn't use cam shims because they just end up chewed up in your oil. I have about 5 on various cams now from the PO, I just left them how I found them, one is already fuct, planned on replacing it. There also on both sides of the cam, case side and cover side. So if using the shims is a no no, whats the sense in removing the tappet guide blocks and checking the endplay? Thanks for the guidance.