You're both correct! It does have the 308 heads and a roller cam. I'm happy. I paid $250 for it and it appears all it is going to need is a mild rebuild (it still has the cross hatch in the cylinders). I'm gonna have it magnafluxed and then check the cylinder taper, but it doesn't appear to have much wear. Not going to put a radical cam in it or a huge carburetor as it's going in a base D100 that gets used as a truck. Looking a a voodoo cam and some headers, a 750 cfm carb, and that's about it.

No sludge or goop in this engine. Apparently the guy was telling the truth when he said it was run on propane.