Carter 750 float level
I have seen two float styles used, a larger float with corrugated sides & a smaller one with plain sides. Not sure if the f/level is the same for both, but I would stick with the floats that came with the carb & set the f/level to the stated amount. If it ain't broke....
On the bullet shaped brass nozzles in the Edel pri boosters. I remember seeing Edel advertising these as giving better performance. Although they didn't state it, the impression was given that it was Edel's idea...
The original AFB on my 66 GTO had these type of nozzles, 20+ yrs before Edel started making AFBs.