I considered doing a 1 1/2" BBD at one time. It is was a 383 carb. Mom had one on her 68 Polara hardtop it got 22mpg at 60-65mph.

I do have one of those 360 Holleys out in the shop a friend gave me. A TQ or Qjet does better on a V-8.

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'72 Duster 198 stock cam, 3:23's Hookers on jack stands for 8 years in the driveway
'79 Maxivan 360 Offy Qjet Comp RV cam/rusting in the driveway.
93 D350 160HP Cummins Auto Dually Clubcab needs a injector pump
2005 Golden Couch Buick