Hello, I have 2 '96 Blazer's one with a great body and a motor that knocks real bad, and one with a body that's rotted out but the motor runs perfect. I am planing to take the motor out of the one that is rotted out and put it in the one with the good body. It has 175,000 miles on it but it runs beautiful! The question is, should I give it a re-ring while it's out? or leave it alone and just put it in (if it ain't broke don't fix it) Any advice or opinion's would be great! Thanks!!