I'm blind I guess. Looking at the two pictures I see, I don't see an adapter plate between the water pump and block. Also, the water pump bolt on top is almost in line with the exhaust manifold bolt. I don't see any side motor mount Bolt holes. (Maybe I just can't see them). You can see the water pump does go above the block level.

In picture two I can't see the captains bars, but I can't seem to zoom in either. Could be there and I'm just not seeing them. Also, I don't see side motor mount bolt holes. You can also tell in picture two the water pump is above the block.

Does not look like my later 235 or 261 when it comes to the water pump and the side mount bolt holes.