[kustombrad]

Go to your local car stereo shop and have them cut you up 3 pieces of 2 gauge wire say 12-16" long (it's a little overkill but I've never had any grounding problems on any cars). Have them crimp the ends you put bolts through and get busy. Assuming you ran the battery ground to the engine, run 1 from the engine (should be lots of extra holes in the block to use) to the frame. Run 1 from the frame to the cab and another from the frame to the bed. Use those serrated washers (looks like a bunch of twisted edges) between each end of the cable and whatever it's bolting to, so it will bite in and give you good contact. It's pretty simple and works great! Just my 2 cents...