I have a 65 Valiant rebuilt stock 273 2bbl motor It has a 4speed dual exhaust 81/4 sure grip with 373s I was thinking of adding a 4bbl but I also have a brand new 500cfm Holley 2 bbl,was wondering what the difference would be between a small 4 bbl 600 cfm or the 500 cfm 2 bbl
Thanks