roll cage
Another option would be to consider:
http://www.wolferacecraft.com/detail.aspx?ID=242
This is a true bolt in cage, but to be 100% NHRA legal you have to have the 2 back bars welded to the main hoop (they are just bolted joints as supplied by wolfe).
keep in mind if you choose chromemoly, you have to have the bars TIG welded which not everyone has. Mild steel allows MIG (wire feed) welding which is more prevalent.


