Hadn't considered AGM. I'll definitely look into it. I already found some pretty decent enclosures for the batteries. When I take the boat out this next weekend I'll take a level with me to see if the boat lists more to one side or the other. Thanks for the reply!
1996 Maxum 2100SR, 5.7L V8, Alpha 1
2004 Chevrolet Avalanche Z71
“All that is necessary for the triumph of evil is for good men to do nothing.” - Edmund Burke