I will try to answer any questions you might have, in the best way I can. But I am a far cry from a expert on this.

If I remember correctly about the faster starting. I was using a $0E bin for a 454 manual trans. It always started real fast, but lots of other issues and quirks. I swapped to a $0D 350 auto bin and had lot of improvements across the board, but it took it much longer to start. It seems I remember opening up two instances of tunerpro and copy and pasting all parameters that had to do with starting, cranking, crank to run, etc.. And that got it back to starting fast. I am curious if those changes would do anything on a mostly stock 350. I dont know how quickly they start.
If you have searched, I'm sure you found out I am running a 16197427 pcm. The bin I am currently running is BJYM, and the bin I copied the starting parameters out of was BMHK.