Hello Bob:
I read your post on the series 78 Optima, as I was at the point of battery replacement and your info came in so handy. I bought just what you suggested and it fell right into place, the only mod was that little piece of bent tin that goes over the horseshoe hold down. So, thanks for sharing the proper part number info
Your Friend
Robert Culley
RLCulster, Elko& Vegas