69 Dart Repo Battery 24 or 27 Group?

[2fine69s]

Hey guys,
I need some schooling on batteries. I have never used a repo battery so, what group do I need? 69 Dart 340, stroked with 10.75 compression and I'm using the mini starter with all new wiring harness in the car. Any help would be greatly appreciated,
Martin

 

[AJ/FormS]

The 24 fits the tray under the hood.If youre sticking it in the back, over the right rear, the 27 will be a few more pounds.At your c/r either will work. The mini seems to be easy on battery.The 27 has a bit better cold cranking reserve.
Tell you what though. I bought the Optima redtop 24 in 1999. Its still going strong 15 years later. I would probably have needed 3 to 5 lead/acid batterys to get this far.So in dollars per year, cheapest battery ever.