Ok just changed the alternator on my 67 firebird. The original engine is in this car how do I know if the alternator is original. Here are the numbers on the alternator 1100148 55a 1D14 12vneg Thank for any help.
According to the GM Firebird Catalogue 1967 Delcotron numbers ranged from 1100761 to 1100788. Delco Remy has the 1100148 listed as a 10SI, system intergrated, internally regulated alternator. Yours should be one with an external regulator.