Well, in my world, five hundred bucks is still $500 regardless of which one of my toys needs it.
That said, if after careful research the truck needs $500 in batteries, so be it, it'll get them.
On the other hand, if another battery is half the cost and will do just as good a job, well, maybe I'll save the $250 for something else.
Then to consider the 31 group. Clearly more punch in the package. There's some major mods that would have to go on to get this done, though I'm no stranger to major mods...
At this time I'm considering getting a decent group 65 battery(s) ($125 range) and then later on come up with new brackets for the SD to hold the 31 batts. Then again, my batts are still working...so maybe I'll just hold off on the whole thing until I can make some 31 mounting.
hmmmm
edit, truck has dual alts now and is a 2012. Upgrade the wire still apply?