Just received my 331 back from the engine builder including having him put an original Ford C9OX intake on that I had for 35 plus years. Then tonight on a video my neighbor sent me showing dyno testing using carburetor vs Holley Sniper. Dual plane intake with the carb and the engine ran fine. They put the Sniper on the same intake and had a bad time getting it to run. They then switched in a single plane intake and the Sniper ran perfectly. What are you guys with the Sniper's using for intakes and the brands?