Just a quick update - I wanted you all to know that I really do value and appreciate all the feedback and commentary. In particular, it caused me to do some additional reading and research on the transmission choice, and have some additional conversation with the guys at the shop. I have changed my mind on the transmission choice, and today I ordered a 4L60E. So, thanks very much for the suggestion!
Sticking with the carb-style efi, though! That's one choice that is totally driven by looks, I'll readily admit.
