in general terms, i refer to the newer and older 4500 series carbs as:
right- "the early style"
left- "hp style"

with regards to G-Bobs original question, i'd get the 8896 myself.

4936962-hp-std.jpg (384 downloads)
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123
Dealer for Comp Cams/Indy Heads