Ken, you may want to look at Lifeline's site. We always recommend the AGM batteries do to the fact that they are maintenance free, the do not gas, and they are very forgiving. The problem with a conventional Lead Acid battery is the acidic fumes and discharge that damage the bay, and cables, That is why you are needing to repaint the battery bay/box. The Lifelines are not inexpensive, but last a long time, and do not emit the vapors that damage the cable ends, electrical components nearby or the bay. They are available in a variety of sizes, and capacities, can be easily shipped, and they are a POG sponsor with discounted pricing.
Steve & Rhonda Bennett
Dana Point, CA
92 Marathon XL40
2012 Jeep Rubicon Unlimited
Owner: California Coach Company, LLC