Ok so I have a 1970 Plymouth fury with a 383 im in the middle of engine tear down. I plastigauged the main bearings and came out with .004 to .005. I’m only getting the engine running for temporary use and won’t be pushing it hard at all. So my question is how bad would it be to run those main bearings for 10/20k miles while I build an engine on the side for more power?