1969 272 casting JO suffix. Looked at the back of the crank hub and looks like a cast crank small holes above the oil filter housing.Was running in a truck but has a flat cam. Someone put peanut port heads on it. Has brackets and some accessories on it. I don't know of the over bore I'll see if I can stick the vote scope down it.
$125 pick up only 20min south of Fresno I have a cherry picker just have a truck