I head swap

[jlevie]

You will need to install the I head, intake/throttle body, AFM, engine harness, CPS, injectors, FPR, and DME.

[camip]

Without changing the intake you would get any gains from the head.

[bcusitsjeff]

Today I got a 173 dme and wire harness off a 90 325i at the junkyard today. I was wondering, would I be able to swap the head into my 85 eta without changing the intake manifold and stuff?
I know I'd have to modify my fuel rail a little but is that all?