45 MB frame with flat head out of a 48. 5.38 w/ stock tires. Tail pipe blue smoke that smells like oil and gas. Oil in the radiator coolant and knocks when hot under a load. Head gasket, bearing, rings, valve seats... I was thinking of compression test first. Then a leak down test to attempt to find weakness. Leading into pulling the oil pan, head and Pistons to get a visual? Replace bad bearings, Ring swap and head gasket in the jeep and call it a day?