Hank, No way you can annoy me about turbos, I started this to learn from everyone. Turbonetics new GTK-1000 looks like something I would like to try, it has a ported shroud, which is needed on a small motor, the ported shroud keeps it out of surge.I also think the T76 would be good fit but with a big turbine. Since you have a 12 port head you have very good flow you can use a big compressor without using very high boost. I'm not sure with my current head setup I could use a T76 but may try one.
To answer your other questions:
Powerglide w/brake 4500 stall
T76 turbo w/"S" trim a/r.96 was 28# now 35# boost
C16 race gas, no water inj.(best run was a draw through on methanol).
7.5-1 compression
571 HP @ wheel about 670 engine, turbo should be good to about 750 to 800 engine, not there yet!!!
Sorry for the long post-Harry
