Vapor lock, I think

[Don C]

If you do a side-by-side comparison of the one from WCCC and the one for the 4350 you will see that are the same. I measured the stud spacing and the throttle bore openings on my CJ Intake manifold and they are the same as the measurements given for the 4350 flange gasket. I'll send a picture of the CJ intake in a few minutes.

 

[RC92234]

If you do a side-by-side comparison of the one from WCCC and the one for the 4350 you will see that are the same. I measured the stud spacing and the throttle bore openings on my CJ Intake manifold and they are the same as the measurements given for the 4350 flange gasket. I'll send a picture of the CJ intake in a few minutes.

Ordered the 4350 gasket. For $7, it won't be a terrible mistake if it doesn't work out..

 

[Don C]

Here is what the manifold carburetor flange looks like:

 

[Stanglover]

I'm just throwing this little extra thing that I did on my 71 intake before I removed the manifold and blocked the exhaust cross-over passages, This might help a bit as it stops the hot gasses getting under the carb base ( that weird looking channel you see in the pic) The holes do not show in Don's photo, but they ought to be there. You can tap those hole for (if I remember) a 5/16" set screw with some exhaust cement. Check!. You NEED to put some grease on the tap so the bits don't get into the motor.
I still use the base gasket with the metal insert, then the fiber spacer and another thin gasket. Of course mine is a square bore, which makes life easier.