how does this swap work? i am a little dumbe when it comes to older hondas...... my girlfriends little bro is getting a old 86 teg with a high milage D16A1 in it. I know a D16A1 is pretty much a us dohc ZC. my quesion is this a a simple swap... ? i know somethings are going to be different what do i have to do? the car has a dc header in it will that work still?