Originally Posted by Workinprogress
Thanks for the reply gentlemen!

The carburetor does have a 1-1/16 cast into the side of it! That was a full on lesson on Holley carbs and that’s exactly the type of learning I am here for and my reason for being here. I am hoping the carb rebuild kit I ordered will fit it. It says AA1 on the box…

Thanks for the input! I like not only knowing the difference, but also why!

Hopefully - the box also says G.M.C., not Ford.

Between the two:

Flange gasket, throttle body gasket, and air horn gaskets are the same.

Fuel valve (a.k.a. needle & seat), accelerator pump, idle mixture screws, main metering jets, and economizer valve are different.

Jon

Good carburetion is fuelish hot air
The most expensive carburetor is the wrong one you attempt to modify.
If you truly believe "one size fits all," try walking a mile in your spouse's shoes!
The Carburetor Shop