Anyone know the correct original style battery that went into a Coupe Deville, or likely all of them?
I think it is a group 27.
This?
https://www.batterycentralmall.com/Batteries/TurboStart/Script/S27D.html
Or (reversed posts)
https://www.batterycentralmall.com/Batteries/TurboStart/Script/S27D_O.html
George,
I’d use the S27D AGM. The terminals align with the wire locations, (+) on the right side and (â€") on the left, looking from the front of the car. The other battery would require crossing the wires to reach the appropriate terminal.
George - I believe the complete General Motors line went to Energizer batteries in 1966. I had a 1966 Pontiac Grand Prix and my dad had a 1966 Bonneville and both had the red cap energizer from the factory. I believe the yellow cap Delco batteries ended in 1965.
I think the post configuration from Ralph is correct but I think the style is as Jon says.
The reason I ask is years ago I bought was as such above for my 1966. However the battery only lasted about 4 years.
Then I looked again recently and see the different style on the antique battery website.
I am actually looking at getting the battery topper this time instead of the antique battery. Currently I have a modern AC Delco battery group 27 but am looking for a topper. Not sure I am into spending an extra $200 for the replica.
However I do not think they make such a topper for a group 27
I converted my Interstate Group 27 very simply by adding an individual letter sticker I had made up and inserting Delco yellow caps. BTW, this battery is 10 years old and still cranks as new.
George,
Jon is correct about the Energizer type. I was referring to terminal configuration and should have been clearer. As far as longevity is concerned, I never got more than 4 years out of a new repro - old style battery...…..Ticks me off.