Hey Hambers . I will finally be able to get to the DMV tomorrow to get my 47 Coupe legal. It has a stock 1966 283 2bbl. My fuel gage reads 3/4 full. PO said he used additives to the gas. I want to fill it up on the maiden voyage tomorrow. So, my question is should I be concerned with valve seat recession ? Marvel Mystery oil ? Or should I just drive it ?