I have a complete Chevy 454 from a class a motorhome. It’s a 4 bolt main with only 50k original miles. It’s a 100% complete and running motor with a turbo 400 transmission still connected to it. I stripped the whole motorhome body off and the engine and transmission are still in the rolling chassis. I will pull the engine out of it once it’s sold or get the whole thing. $1200.00 firm