Type of breaker points

66 dd \6. sign o the beast for sure.

Having an acceleration issue getting past 20mpg. If I push pedal too fast it will try to stall. If I can get past 25mpg, then I can push the pedal as fast as I want and it works fine.

It is newly rebuilt engine, this was an issue I had prior to being rebuilt.

I am thinking about replacing the breaker points, I bought the part, however I notice on the old part it has a small little felt finger, that my new one doesnt have? Did I get the wrong one?

Or does this sound more like a Carb issue?
btw: all spark plug wires, rotor, cap, plugs are brand new.