if that P72 hasn't been chipped at all you could sell it for a good price. I suggest getting the ECU that you know will work with the B16A (not sure what the code is off the top of my head). That way you know that you won't have problems and that it will work like it was built to.
If you don't have a contact for a new ECU, email my buddy Brian Wong at
bwsf@hotmail.com he'll have it.
Hope it helps.