And how are you tuning the EFI?

Long story short, it's time to sell the grand national and I need a new project. Forced induction is just too fun to ignore, so I'm thinking of turbocharging a late 90's 360 magnum. EFI is also a must with me so I thought I'd see what others are running for an ECU to keep the multiport setup. If it's possible to reflash or modify a stock ECM that would probably be cheaper but tunability probably sucks.

Anyone here doing it? I think it'd be an ideal platform for a budget turbo engine, if I can keep the EFI costs under control.