Frankenstein ECU Question

Would a 2004 ECU for an EZ30D car be able to run an EZ30R? I know that the R version has AVLS, but if I understand correctly, the engine will work without AVLS being wired up. I want to get it to run on a stock Subaru ECU (preferably without immobilizer, hence 2004) to get a smog check, then switch to standalone. I assume the pinouts would be different between the ECUs but I'm willing to modify the wiring for that. Is there anything else that would prevent me from doing this? (after writing this I realized that DBW could be a problem, but could the DBC metal manifold from an EZ30D fit on an R?)