i've begun upgradeing my 100a altenator to a 140a. it bolts right in, my 97 tahoe5.7 vortec. but, my factory belt is small and the plug is different. i can get a plug adaptor. what do i do about the belt? anyone know off hand i can cross reference to get the proper length belt? i have the six groove pulley's and i have a 1500 tahoe. any help? anyone? will the 2500 beltwork?