1100662 alt ??

[Mr70]

That Alternator looks like a Buick application,but I can't confirm right now.
There is someone selling that Alt. right now for $50.00.

Not sure about what pulley you have on it,
but DG Pulley #3829387 was used on:
*1967 Z/28 Camaro
*1966 L-78 Chevelle
*1965 & 66 L-78 Impala

[69L72RS]

Thanks for the info guys.
The pulley is a 3829387AI, just like the one on my Z alt.
Someone must have switched it in the past or GM made a mismatched service part.