49 F1 I 6 carb question

[GasWorksGarage]

Does anyone know why someone would put 8 carb to intake gasket on ? Also should the small hole on the bottom of the carb not be block

[toby]

Maybe trying to use the gaskets as a carb spacer? Also the hole in the carb throttle body should line up with the hole in the gasket.

[Ross F-1]

The exhaust manifold heats the intake under the carb by design (they are bolted together). As I recall, 3 gaskets were installed by the factory. Your truck probably has extras to try to prevent boiling in the carb with modern fuel.

The hole in the bottom of the carb is a dead-end, should be blocked.

[GasWorksGarage]

Thanks all. Any leads on where I could get a 1/2 inch spacer?

[1952henry]

Phenolic sheet can be had from Mcmaster Carr for $65 ish +shipping. Aluminum can be had from online metals for $30 ish plus shipping. Both would require a trip to a machine shop. Better yet, if you have an iron monger local, a drop piece of .5" aluminum would be next to nothing. That route would also lead you to a machine shop. With careful measuring, and the correct bit, you could do it yourself.

[scicala]

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I'm pretty sure the small hole on the base of the carb gasket surface is to supply manifold vacuum to the power piston, that opens and closes the power valve. It wouldn't hurt to notch the gasket that's closest to the carb so the hole gets manifold vacuum. If the notch isn't needed, it won't hurt anything by being there.

Sal

[Ross F-1]

It is for the PV, but is just the end of a vertical passage that has a branch off it to the throttle bore.

[scicala]

Ross, thanks for the illustration. I would check the carb being used to make sure there is a hole in the bore too. I saw one Model 847 like that before, and there was no hole in the bore that intersected with the vertical channel.

Sal