Those are the correct casting numbers but they should be dated around the same time as your engine assembly date, not the cars assembly date.
That smog pump (which was installed on the engine dress line) is dated August 4th, 1966 so while it's within the "6 month" accepted time, IMO, it's too early for your car. However, for an L48 you need a 5696468 pump. The 5696132 is a Corvette pump.
Ed