still have issues with battery box and rear axle bottoming out so looking down this route would this battery be ok for the job

http://www.ebay.co.uk/itm/ODYSSEY-PC680-Racing-Battery/271214505083?_trksid=p5197.m1992&_trkparms=aid%3D111000%26algo%3DREC.CURRENT%26ao%3D1%26asc%3D14%26meid%3D8088439698569219560%26pid%3D100015%26prg%3D1006%26rk%3D1%26sd%3D271214505083%26

Ive got an odyssey race battery in mine, its fitted in between my centre console,
ok for starting, but not for running any excessories.
make sure you get a good charger for it, I cant remember what mine is, Ill have a look today.
Im sure others will have their own thoughts about on it. 
if you got to the odyssey site, they recommend the chargers I think, I had a look at one of the race forums to ask about mine.