[jfrolang]

basically you don't need to do anything except take out the B18 and put the B20 in it's place. Same mounts, transmission, ECU, distributor, everything.

 

[jfrolang]

Just use your b18 ecu. The engines are virtually identical except for the cylinder bore.

 

[jfrolang]

Well when I said use the B18 ECU that also meant the harness. You can swap the dizzy over with it. I know of B20 swaps that run fine on PR4s and P74/5s.

 

[jfrolang]

To see what the ECU is pull it out and look at the side. You'll see a sticker like this. You can see that it's a PR4.

The tranny will bolt up exactly the same.