Is it legal to put a screw supercharger on my Big Block Chevy Top Dragster?

Answer:

Yes, Top Dragster section 6B page 7 of the 2016 NHRA Rulebook reads. "Roots-type, high-helix roots-type, centrifugal, or screw-type supercharger permitted. Screw-type supercharger must meet SFI Spec 34.1 and be reinspected by the manufacture every three years.  Manifold burst panel meeting SFI Spec 23.1 (in addition to panel in supercharger) plus restraint system meeting SFI Spec 14.21 mandatory on all screw-type superchargers.