As a side project, we have a '65 Galaxy 500 4 door. Today it was rolled around from the back yard to the drive way. When we picked it up last winter, the engine was stuck tight. Using some garage logic, and barn yard engineering, she turns free now. The original carb is seized tight, even after applying heat, and soaking in PB Blaster. The owner gave the go ahead to order an aftermarket carb, (eBay special Chinese I'm sure). The engine oil doesn't look bad, and the large amounts of trans fluid and penetrating oil didn't drain past the Piston rings. That's good news. After the engine does fire, I will dump in a quart of kerosene in to the oil. Then run the engine for 10 minutes at idle, then dump. The oil that will be dumped in will be some cheap dime store oil, then the process will be repeated until I'm satisfied that the engine is clean.