You may want to wait and see what the SFI and NHRA rules comitte does this next time around. There is lots of talk that they are going to bust the M/S Cars back to 8.50 certifications.
Check on
www.speedtalk.com in the section called General Discussions for the thread begun by me.
I will agree that I think a correctly fitted and fabbed M/S cage is safer in a crash but we don't make the rules.
Ed