i dont know if this will help you-----but i switched over from an 'INDY" set up---my 446 w/ indy heads 440-1--mine flowed 390.my motor was around 700hp----i bought a complete all alum B1 MC eng-carb to pan---it was 1100 hp on the dyno--i've had it 2 years now-love it.
1970 DART B1MC N/A
8.86@ [Email]155
3200 lb on 275 DR
5.30 @ 130 1/8