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The front area of my original 2 bbl Rochester carb has the usual rusty build-up (on the inside of the cast-iron base). I was planning on cleaning the majority of the rust off, and then coating it with POR-15 silver to seal it. Will the silver hold-up in the hot/fuel enviornment of the carburetor? I don't want the stuff to flake off and get sucked down into the manifold. Any thoughts?
 

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I just rebuilt my 2bbl rochester and I think I know the spot you are talking about. I think that passage is exposed directly to hot exhaust gasses. I looks to me like the two holes in the intake manifold directly below it lead to the exhaust crossover. The stuff on mine also looked like exhaust residue.

If this is the case, I don't think POR15 will stand up. You might want to use some of that header paint, maybe the kind that you bake. the base could easily fit into an oven or even a toster oven.

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Charles Perrell
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65 malibu SS Convertible
283 2v powerglide
 
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