Nice...what's the dimensions of the 65 series? I cannot find anything on I am looking to get the largest CCA Optima battery that will fit...but they don't make a series 65, so I am thinking the 34 series..(800 CCA & 980 CA)....
According to this Link
the 34 series is only about 1/2" longer than the suggested 75/25 series, so I am thinking it might fit without cutting the tray.
It is like 10 degrees outside right now..and I would love to have the extra starting power....!!