I use a Odessey AGM battery in my 64 Savoy, installed in the trunk. It does not vent off sulfuric acid fumes like a conventional battery. I have it installed in an aluminum battery box. Still going strong after 7 years, keep it charged every other week. Cranks up my 505 with ease. Highly recommend. I also use 1/0 battery cables from the battery to the starter.