I was not crazy about the brake handle location on the 1/2 ton truck but I liked it on the 1 ton trucks. This picture shows my first whack at relocating the handle. I used a handle from a 1 ton. I have since moved it back and even with the gear shift.
I made a mount for the rachet and handle from 4" channel stock. This mounts to the bottom of the high hump cover. The bigger problem is routing the forward brake cable. I moved mine to the inside top of the swing arms. The cable now goes through the cross member close to the drive shaft.
I used an emeregency brake cable junction bracket to gather and align the cable ends. I pull the center section with a rod to the 1 ton handle.
This web page has some product to help you.
http://www.controlcables.com/parking-brake-hardware/
If you search this forum for Lakeroadster, he also used a floor mounted brake handle.