Carb CFM recommendations

For the uses you describe, the primary barrels will be the only ones flowing air 99.9% of the time. You'll get into the secondaries only when making a hard acceleration at mid rpms (3000 up). So don't worry about the marketing size so much. None of those mentioned will limit the fun because they are too small. At the drag strip, odds are you'll mph better in the 1/4 with the slightly larger ones. But since thats not in the plans, its irrelevant.

IMO, use one that matches the intake. Speadbore if its a speadbore intake like the performer or LD4B.