wiring problems 74 valiant

ok got a working volt meter and the bettery with the car off is just under 12.6 once i start the car it goes to 12.5 then goes up to 12.7 and just hovers there the alt. is putting out 14.8. i tried to get to the ammeter but its harder to pull the cluster out then i thought the speedo is unplugged is there anything else i need to remove to take the cluster out?