Disappointing dyno results

My 340 was broke in and put on dyno. It's a 340 with mild cam 214/218 @ .050, 110 LSA, .440/.450 lift. Carb is a period correct Carter AVS which was rebuilt by Woodruff Carburetor.
Results of dyno was disappointing. A/F ratio indicates extremely rich condition. scfm low as well. Engine guy making noise that carb is too big but that particular carb came with engine from Chrysler. My time on dyno is limited so need to resolve this as soon as possible. Any ideas would be appreciated.

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