Yeah it hard to make out what that last digit is beside the 7 for what year it was cast. My guess would be a 0 or a 9. If it’s a 0 then it’s an early build 360 since I think they came out in 71?
Yes that's what I was thinking. That would be way early. Got to be a 9 because it has the holes in the exhaust ports for the air pump. I'm leaning toward smogger motor. 79.
I suppose someone could have swapped smogger heads onto a 70 block. Before someone else says it, haha.