Nice work! What ended up being the problem for it not starting? I think if you have timing locked at 12, that may be too low for a cold engine. Try locking it at 15 or 20, then verify your timing with a light. Then fine tune the offset you already did manually. It may only be a degree or two, but you want it to be right, especially in a turbo application. After you get that set, you can unlock it and let it run on the table. Also, if the TB throttle plate adjustment didn't do anything, maybe you have a vaccuum leak?
Do you have an IAC valve? My TB uses the GM type and I learned the hard way that GM made two different types. One has a brass plunger on it and one with a rubber plunger. The brass punger is smaller and therfore didn't seal off the hole. Thus, a huge vaccum leak! Once I got the one with the rubber plunger, I was able to control idle.
