Your symptoms can be caused by using a vacuum gauge to set the idle mixture control screw for the highest vacuum.

Set the timing per the service manual first.

Then reset the idle mixture control screw.

Since you have the P/G, make sure you have the correct spacer and gasket under the carb.

Jon.

Good carburetion is fuelish hot air
The most expensive carburetor is the wrong one you attempt to modify.
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