just found i have a crack at carb base where the vacuum advance hose fitting, crack where the tube fits in, small amout of vacuum leak. tube doesn't not have a perfect snug fit like it should. will J B WELD work here or do i need another cure. on 76 /6 duster/ 1 bl holley. rebuild carb i've had for 4-5 months, probably had hairline crack there when i got it.
