500 cfm 2v is NOT 500 CFM 4V!!!!!!!

But... a 500 cfm 2V is measured a 3 inches of vaccum not 1.5 inches like a 4v carb so it is really like a 350 cfm 4v or something. A basic single 600 or 750 should perform better. I should think that the two 2v's would be far too restrictive and not worth the tuning effort, when a 500-525 cfm 4 v carbs like the edelbrock are only $200-$250 each new.

Pippin
User Name: TorinoBP88
1868 Torino GT Fstbk