Hey Bart, I believe that biagionim is still trying to get out of the driveway - so the use of his secondaries before hitting the street might be a bit premature.
The use of the 750 AFB isn't that terrible of choice on his 350. Of course, I would also argue that the pre-set air flap doesn't see anything more than the volume of air passing by it and doesn't know whether it is on a 327 SB, 400 SB, or the similar displacement Pontiac blocks. I know that two 650 4's on my 455 never had a bog. I also know that old and new AFB's come jetted so lean out of the box that there is always a bog until properly jetted.
Many of us run 14-16 degrees initial after insuring that total timing doesn't exceed 34-36 degrees. Many GM distributors don't have much mechanical advance built into them and it might be safe to run the 16° and not have too much timing on the top end, but you won't know until you get a timing tape or dial back timing light. As Bart said, there's a lot of potential in a properly curved distributor.