You do not have to use a battery box for autox. The rules only state that relocated batteries must be secured and must be mounted behind the back seats.
Also, our tech inspector at SJR is a Volvo guy and he has 40+ Volvos coming to our August 11th event from all over the east coast, including Canada. Come on out!
http://www.tristatetuners.com/forum/...d.php?t=118834