I had the same question a few years ago. I got a small one, Dry Chemical, at the local hardware store. It's about 10 inches long, and looks good enough for one fire. And it passed a chapter, and regional show. Also get a battery dis-connect, avail from Mid America, Corvette Central, and others for about $10 or so. Those, plus a NCRS window sticker will get you an extra 10 points for judging. I just put mine behind the seat, loose. But take it ouot of the box! That way, you don't have to drill any holes. Good Luck!!!