here's the diff. .
the top is a Y8, and the bottom is a dohc ZC
and yeah, as far as the exh., all the d's have the same bolt patern, but you can run into agle problems under the car because of the angle that some motor's are mounted. like if you put a header from an EF on a 1st gen teg, it will be pointing up into the floor of the car, or if you do it the other way around, it will be pointing towrds the ground. lol