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Old Mar 23, 2023 | 05:00 PM
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Carburetor

78’ 351m carburetor stud thread count ??
 
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Old Mar 24, 2023 | 07:25 AM
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Should be fine thread , 5/16-24
if yours has coarse threads, like some back in the 70s, then 5/16-18
 
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Old Mar 29, 2023 | 12:41 PM
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Most all I've seen, studs had 5/16-18 course into the manifold, but 5/16-24 up on carb end.

I've used 5/16-18 threaded rod and run it into the manifold to bottom or just smack the thread to snug the rod in the hole ... then used a nylock nut and washer on the carb end. Not too tight, don't want broken ears. I use wheel bearing grease on my carb to manifold gaskets.
 
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