Okay I gotta ask... Why a roll cage? Are you planning on running quicker then 10. 00? Also are you 4x4?
From the NHRA rule book:Roll cage mandatory in cars running 10. 99 or quicker or any car exceeding 135mph. In full-bodied cars, with unaltered firewall, floor, and body (from firewall rearward, wheeltubs permitted), running between 10. 00 and 10. 99, roll bar permitted in place of roll cage.
Did you have a tech inspector tell you, that you needed a roll cage? Roll bars are a lot cheaper, lighter, and easier to fit into the pickups then cages.
Paul
You are correct on the nhra rules. I heard there might be a change for our heavy trucks next year, so I wanted to look at all options. Yes my truck is 4x4 and I think it will go low 10's at 130-135 mph.