[vin63]

If you are going to install a cage in your truck, I would strongly recommend running at least a pair of rearward bars off of the main hoop. Depending on how fast/quick you end up going, the cage will not certify without those rearward structures. When I worked at Gale Banks, we built a couple of trucks that placed the rearward bars through the window, so there were no holes through the cab structure. The windows were Lexan/polycarbonate, so it was easy to notch or cut holes. This photo is of the S-10/15 that Don Ness built that uses the same concept:


Also, if this is your first roll cage build, I would work with a professional chassis builder, or contract it out.