I would agree with 61-63 about way too rich with those numbers.
But even if you get the numbers dialed in, EXPECT hesitations on the street at various RPM's with the imitation carbs when the secondary(2) try to engage because of the wrong auxiliary air valves for Pontiac use. If drag racing and you leave the line at 6000 RPM, the air valves won't be a problem
Jon.
__________________
"Good carburetion is fuelish hot air".
"The most expensive carburetor is the wrong one given to you by your neighbor".
If you truly believe that "one size fits all" try walking a mile in your spouse's shoes!
Owner of The Carburetor Shop, LLC (of Missouri).
Current caretaker of the remains of Stromberg Caburetor, and custodian of the existing Carter and Kingston carburetor drawings.