[bertfam]

My Hollanders shows a 661 and a 663 used for 1964 Buicks. It doesn't show the 662! On the other hand, my Mitchells shows the 662, but doesn't tell me exactly what model it was used on! However, since the 661 and 663 were used on 64 Buicks, I would guess that the 662 was also for a 64 Buick. But since the date on yours is March 23, 1968 (or 78, or 88, or 98, etc...), it's probably a service replacement.

Ed