What is the correct battery?

[Mark_B]

Hi All,

Can anyone please tell me the correct car battery for a 340 Challenger?  The current one in my car says 34, is this correct?  Can any other sizes fit?  Mine's gone flat and won't come back to life.

Thanks for any help you can give.

Cheers,

Mark.

[Bullitt-]

  For my smallblock '73 GROUP24 is the correct size (careful not to get a GROUP24F, posts reversed), I believe some models may use a GROUP27 which is slightly longer. Look up your model on any auto parts stores web page & they will have what's recommended.   
  These would be the correct dimensions to fit the tray & OE style hold down hardware.
     Anything else could be an issue..

here you can see the dimensions https://www.batteryequivalents.com/bci-battery-group-size-chart.html

[Mark_B]

Thanks for the information.  I'll have a look for a Group 24 battery.