Head Swaps & Pork Chops.

Hello!

I have a 1979 L24E, whose head is an N47 (I think). My friend has an N42 head off of a 75 280z. I've heard tales of larger valves and larger (or better) square exhaust ports. If I swapped the head, I would use the 280z cam, valvetrain, etc.

My question is: If I swapped in the N42 head, would I see any real benefits with my dished pistons? Are there combustion chamber differences between these two heads?