Benny,the break I used didn't even need to be a box & pan break because I didn't cover the ends of the battery, just the main side and the top. but if you want to cover the ends too, a b&p break is needed or build the ends seperately with one half inch flanges and attach them with stainless rivets or even bronze or copper fasteners might look cool. welding them on with a tig welder is a possibility but it would probably distort the flat metal. do you know a high school kid in metal shop? You would need to lay it out on the metal, cut off all that's not needed and bend away. let me think some more on that one,have to get going here,4 thirty comes awfull fast nowadays.
mike