I'll run some MMO through the oil. I've never added it to fuel. I guess that's something I can try too. My theory is that it need new rings. I plan to do a leak down test too.
Just got off the phone with O'Reilly and they want around $1650 for a rebuilt 250ci long block plus a core exchange. Comes with a 3 year unlimited mileage warranty.
I'm gonna check the local machine shop for a price. That way I could order the cam I want.