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I believe your top lines reads:
1102481 63A (for 63 amp)
Second line reads:
7L30-12VNEG (which is the date code 1967 December 30, 12 volt, negative ground
I don't seem to have a listing for the original application, but I'll keep looking.
Cheers, Greg
OK, looks like the 481 was a regular work horse alternator used on Pontiac A,B,F & G platforms, 350, 400 & 455 without air conditioning up to around 1975. It could have been used in other GM lines as well.
A body- GTO, LeMans, etc.
B body- Full size Bonneville, Catalina, etc.
F body Firebird, Trans Am, etc.
G body- Grand Prix
7L30 is the date, 7 - 1967 or 77, L - December & 30 the 30th of the month.
It could be a 1102480 61 amp, 1102481 65 amp, 1102482 55 amp, 1102483 37 amp or a 1102484 42 amp Delco alternator.
I think the 11024xx numbers were first used in 75 (at least on Corvettes), but the back plate on that alt is a 63-72 Delco 10DN style back, not the 10SI back a 1102xxx series alternator would have used. Rebuilders often swap parts around so it may be a 78 alt assembled in Dec. 77 using an earlier back, or it could be a 68 alt assembled in 67, but I think Delco alt part numbers were in the 1100xxx range in 1968.
The amperage will be in the numbers below the bolt, behind the part number.
Alternator Identification
