Ah -- not only port size, but port location. Well observed. I was ready to blame "Speed Daddy", but will refrain from thatThe headers will be bigger than the head ports
I don't know if there is an excessive amount of difference between the blocks, but have you considered trying to swap a modern top end on the block? It could still stay odd fire
Heads have to be for the odd fire Aj. They changed the water passengers when the even fire block came out in mid 77.