carby size help

(CID x RPM)/3456
Anything you got in stock, under 750, or a big TQ. I love TQs
With a strong 400 and 275/60-15 tires or less, she will annihilate the tires, so it won't much matter. As a streeter even a 2bbl (jus saying not suggesting)will be strong to 60 mph, which will be 5700rpm in 1st, with 28s.