ok. the 90 dx is dual point fi, the 86 is programmed fuel injection. im guessing the programmed is better, not sure why, it looks better but would it make a difference swapping them and how would i go about doing it. and also, would the head from the 1st gen si better than the head on the second gen dx?

 

I'm not positive, but i dont think parts from the motors are compatible. I'd have to look into it further, but u can do that for me . http://www.redpepperracing.com