Early LA motor compared to Later LA motor?

Thye are identical except for piston design, and some head changes depending on the model. 4bbls had 360 heads, some had better cams, and windage trays later in the 70s and 80s. The std 318 heads were always the same. Smaller chamber but still open design, I think it's in '72 they make the chamber a little larger, but no real changes at all from start to finish.