From what i researched, you will need the ECU from the donor car.
the SOHC auto trans isn't really the best to put in a DOHC car, (again from what i researched the tranny will not handle the dohc)
manual on the other hand i have seen work with both transmissions.
some other stuff i came across, the engine harness should be changed, but can still be used if you file the locator pins off.
I got lots of information from www.differentracing.com