I'm sorry Spanker, but I think this is horrible advice. The guy is close to a Norwood 6, now is the time to pull the trigger and get a transplant. Do you think he should wait until he's 80 years old and a NW7??
Brutus, I think you have plenty of donor to pull off a decent result. My guess is you have aboot this much to spare (within the red zone). You're about the same NW stage that I'm at.
Keep in mind you might have a bigger donor zone, but I'm just being conservative