I have been running a Fullriver HC680 in my 180SX with great results, its never been an issue, its small, lightweight and the M6 screws are so much nicer than the posts (which it also comes with). When it came to the Hilux I chose the same battery, a HC680 but since I also needed one for the PS13 I decided I should try something a little larger. Nick Heuschele from R&J batteries contacted me and said I should try the HC28 as it is the ideal battery for my build, it was also availiable with a powdercoated steel cradle that means it takes the hassle out of trying to mount a battery safely. Im looking forward to mounting this in the chassis, thanks Nick.