I can't remember who on this forum made the suggestion that I check out Lifeline batteries. My battery box only had room....it appeared...for a size 24 battery and someone suggested the LL 31T. It was actually shorter than the size 27. But.....it wouldn't fit. Too little clearance. But the LL dealer said to try the larger 27 because the reason it was large was for the ears that hold the battery strap. With those ears removed it was appx 12" and fit perfectly into my bbox. To whoever recommended LL, thanks. I got 100AH instead of 80. Never dipped below 3/4 in trip to Glacier.