Ive got a d16y7 with manual transmission right now. A guy is parting out an automatic z6. I can use the head and dizzy but not his ECU right?

 

That's correct!

 

well you can use the ecu, if you convert your car from obd2-obd1 and open the ecu and convert the ecu from auto to manual,

 

It looks like thats the route im going. Also im currently using the 3 wire IACV on my throttle body but my intake manifold (Y8 IM) has a 2 wired one. When I convert from obd2-obd1 will I be able to easily switch to the 2wire IACV so I can get a new TB later down the road?

 

yeah there is alot of diy on how to convert from 3 wire iacv to 2 wire iacv