408 6pack setup

Hi all, thanks for the input. I have mopar alloy heads similar to edelbrocks straight from box no port work as of yet. 3.45 gear ratio in diff. 5spd manual gearbox. Dyno was done in 4th 1:1. Carbies are genuine 2300 holleys. 3/8 fuel line pressure bout 5/6psi. 11.1 comp.hughes 1.6 rockers. Solid cam stated as above. Something is obviously wrong with it only making per to 4600. cam dialled in wrong maybe or heads/intake bit restrictive. Total timing was 31deg which it was fine with. We did vary it from 28 to bout 33 to find where it sat best. Was bit lean at times but think its getting enough fuel atm, just unsure of why only making per to 4600
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