Installing new GP in my 84 k10. 139k on motor I figure it's about time to replace them. So I bought a bosch set from leroy diesel 6.2/ 6.5 ones. I also got the removal tool to pull the old ones out. Pop the first one out no problem go to put the new one back in and it wont go in. It seem like the new plugs are a hair bigger than the old ones. Do I need to ream out the holes? If so is there a part number that fits the 6.2 every thing I have looked up is for the 6.6 duramax. thanks for the help