[Clay Arnett]

Junior, Yes the box is legal in S/SS but be warned that those boxes have a traction control detection system and MSD recommends not using that box with a Distributor. When that goes off there is an imposed 4000 RPM rev limit for 24 hours. It says in the instructions that an NHRA official can reset it but what they leave out is that it's only at national events. If you are using a crank trigger you should be fine. Personally I would get the 7535 because it does not have traction control detection or the slew rate option. Hope this helps.