hey, another thought. does any of your 450's have a mondo e-brake? i bought this truck that used to be an old energy truck and it has this hydraulic override. you pull a ****, push down the brake pedal, and it supplies like 7000psi or somethin stupid to all 6 tires. no way you are movin it w/ the e-brake pulled.

just wonderin if you know much about them? i have this one, but the truck is is pieces (see photo gallery) and i never got to test it out yet.