Good call 120fly a factory ECU isn't the way to go...

I'm a Computer engineer and part time electronics geek and I thought about dicking around with a factory ECU then decidied against it just because the tuning was going to be a PIA.

I've seen a coupla of factory ECU grafts and both used as much factory wiring as poss, all factory sensors and the factory tuning.

If any of you guys are thinking of going EFI do yourself a favor and spend the coin and get an aftermarket tuneable ECU.

I use a locally made Link ECU to run fuel only is 7 wires, to run fully adjusable spark is another 3 last one I got for NZ$600
$900 for tuning must hurt!
I set mine up on the road using a wideband O2 and a Gtech then it's just a coupla runs on the dyno to smooth out the power curve.