Originally Posted by autoxcuda
Thinking about buying a group 27 repro battery.

What is the difference between early 65-68? red top and later 69-72? battery.

I have a late one with green tops I’m debating gutting and putting a small mini battery inside

They sell red tops separate ?

This is what I have. It’s got a 29…. Part number




My gut feeling is cap color has something to do with cold cranking amps maybe. or manufacturer year,,,,or both

I went with red caps

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