Rob and I talked by phone Friday night about his alternator change-out and emailed this morning about it.
An important point came up in our email exchange and that is when you buy an ACDelco Reman alternator or any remanufactured (rather than rebuilt) alternator, sometimes the output current stamped on the alternator end frame will be incorrect. Initialy, this caused Rob some concern and that was the subject of our conversations. In the end, Rob's dealer explained the situation and confirmed he had the correct alternator.
In Rob's case, the ACD Reman PN 321-567 was the correct unit for an LT5, however, the endframe was stamped "108A" which, ordinarily, would indicate it was the *wrong* unit for an LT5 which takes a 120 or 124 amp alternator.
In the end, the 321-567 is the right reman part regardless of what the endframe is stamped because the remanufacturing process mixes parts. It's the internals that make a CS144 put out 120 amps not the endframe. ACD and other remanufacturers may not take care put the correct endframes on a reman assy. so going by the endframe stampings as to output of a reman unit is not a good idea. It's the remanufacturer's part label that's the difinitive ID.