We see the same problem once in a while on the early carbs. If it's not a Ram Air or other incredibly valuable carb, best to get another casting. We have managed to repair a few of these, just fixed one a few weeks ago for a 1968 Camaro the owner just had to have for his restoration. It can be time consuming (expensive), but we've managed to be pretty successful repairing them.
If the carb is cracked in the wells, I'd take a hard look at the threads for the fuel inlet seat and fuel filter housing, most often they need heli-coiled as well.....Cliff
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https://cliffshighperformance.com/
73 Ventura, SOLD 455, 3740lbs, 11.30's at 120mph, 1977 Pontiac Q-jet, HO intake, HEI, 10" converter, 3.42 gears, DOT's, 7.20's at 96mph and still WAY under the roll bar rule. Best ET to date 7.18 at 97MPH (1/8th mile),
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