I'm not a carb expert, but I'm pretty sure that is a Bendix-Stromberg WW 2 barrel carb. Had one on my '57 GMC.

It had
Bendix
Stromberg
cast on the back.

Below from '57 GMC Maintenance Manual. The one on the left was for GMC 302 inline 6 engines and the one on the right was for GMC (Pontiac) 347 V8 engines.
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Last edited by Bill Hanlon; 03/21/2023 3:49 AM.
'57 GMC 102, Original 347 V8, HydraMatic, 3.08 rear gear, added A/C, disk front brakes, HEI, AFB carb, '98 Honda Black Currant paint. T-boned and totaled 10/12
'52 GMC 152 Stake Bed, Original 228, SM420, added A/C, HEI, disk front brakes, '67 Chev 3.55 rear gear. Gets used as a real truck.