Carb Swap?

I would try an RPM style intake and a bigger carb Forsure. 1406 is a tad small for a healthy 360. I swapped from a 625cfm Street Demon to a Quick Fuel 750vs Slayer and it was night and day. I'm selling my Quick Fuel if your interested, PM me or check it out in the classifieds mechanical section, my ad is there.

I'd try a 750 vacuum secondary or a 650 mech secondary I get you'd be pleasantly surprised. An RPM or air gap style intake made a huge diff on my 360 too after changing out the factory cast iron 4bbl intake.