[c1087]

The SPID for my '76 also lists ZV7 Delete Freedom Feature. I did a quick search for GM RPO ZV7 and it showed up in a couple of places as Freedom Battery Delete. It looks like Delco used the Freedom name for its sealed/maintenance-free battery in 1976. The K20 SPID you posted and the one for my '76 both list UA1 as a heavy duty battery. I'm guessing that if UA1 was chosen for the heavy duty battery then ZV7 went along with it to delete the standard battery. If you can find a '76 SPID with only one or the other, you would debunk this theory. Again, this is all just my best guess.