Yea I think I understand the differences. The reason I was bouncing between early and eagle hemis was that it depends what one I find. FAST XFI 2.0 should be able to control just about anything though.
We use the holley HP in that kit, and the dominator with our auto trans kit. I assume your desire for the pullout engine is cost driven?
It's just going to be a pretty different route pending which way you do.
