Motor looks good. I bet you could have plopped it in and she'd have run like a champ! Those heads haven't been touched, at least from the pictures. Small block mopars hardly give a ridge, especially if the oil was changed regular. Nice motor!
You could throw a gasket kit, change the oil pump and I'll bet it would run just fine. If it's all factory it does have the hot cam by the looks of the valve springs.