I sent my 66 off to get body work done and the idiot left the car out in the elements without an air cleaner. When I got the car back the engine was seized, I drained a pint of water out of the oil filter. So drained out the muck, pulled the plugs, and filled cylinders with marvel for a week and built a tool to mount on balancer so after a week slowly got the engine freed up, flushed out all the marvel and put fresh oil filter in and she started up again. After running for a few more times changed the oil again it is running really rich really black plugs. Did a compression test dry was 155 to 160 and went up to 180 190 wet (oil added to cyl) I am guessing the rings were rusted to the walls and have scored the walls and are not sealing well. My question is can this engine every be good enough to drive without a rebuild as 150 to 155 is below spec for this engine is a 390. Ran thru 3 gallons of premium gas after running at idle for 30 or 40 minutes and a quick 5 minute test drive, does not idLe will stall very easy. Changing fuel tank and lines, and will check for vacuum leaks at base of carb. Looking to just get it running decent.