I'm no Rochester expert, but 2 things stand out.
6psi is more than the service manual calls for.
Rochester one barrel carbs already have vented float bowls.
Last edited by Bill Hanlon; 10/28/2026 6:18 PM.
'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.
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