Just upgraded to Lifeline 27's
I recently replaced the 2 stock size 24 stock Interstate batteries on my 23' International FB with size 27 Lifeline gel batteries (rated at 100 AH each). As was described, I had to drill out the cover rivets and bend back the front lip of the box (the height was fine though).
I have a solar setup, and needed more boondock capacity. I can post pics, if you want.
"If I were only somebody else, I wonder who I would be? Pablo Picasso? Attila The Hun? I certainly wouldn't be me!" - Kliban