Cab,
SC is the new entry level, all the Jr. Dragster kids and all.

SST is .5 tree, this allows everyone to be competitive and not spend a fortune on tires, chassis, converters ET AL. to try and hit a .370 tree in SG....

IF NHRA would put SG on a .5 tree many old cars would come back, and many would move from SST. But to be truly competitive on .4 tree you need a specialty chassis, convertor, and it's a big jump.

"Livin' in a powder keg and givin' off sparks" 4 Street cars, 5 Race engines