[Gaz64]

Lovely car Ray.

A 770 is only good for about 5000, so depends on the camshaft and the rest of the engine combo as to how hard the engine can spin.

Perhaps you post a video of the engine idling, and/or under load from 2000 up?

With the restricted air cleaner size, you need the best/less restrictive filter media.

Once you are used to the power, a larger carburetor might be in your future.

Gary