I use the MSD Launch Control with 3-step #8735 and an old 6AL #6420 ignition. Been running it for years. No issues after hundreds of passes.

MSD 8735 Launch Control Module Selector

To help drag racers achieve even more consistency, our engineers have incorporated an adjustable low rpm stage into a Three Step Module Selector! This allows you to make adjustments in 100 rpm increments from the driver's seat! The Launch Control Module features a shielded harness for increased...

www.holley.com

 

I have the 8732 along with my MSD Digital 6AL box for about 8 years in my stick car in my sig. Been happy with it.

I have not used the Analog box, so can not compare it.

 

I am a fan of Analog. Seem to be more reliable. But it depends on your needs. (wants?)

 

6AL box and a 3 step, I think it's a 8737 been in my car for a long time.

 

Thank you everybody. I went 11.050 yesterday on midgrade gas all motor and I need a cool night to get it to 10.90 , my goal! 3x to the strip I hadn't got there... maybe the brake would do the trick. My two goals on this motor build was to get the other wheel up with the brake, and to get a hi 10 second pass

 

 

Just a heads up for the old style MSD module boxes. Last weekend at the track, I seen one cost a friend a round. The circuit board in them is held in place by 2 screws. Those screws came loose and fell out on the one he had in his dragster. Needless to say metal screws vibrating around and shorting out a 2 step isn't good.

Doesn't pertain to a new one but if any of you guys have some in older cars might want to check them.

 

Mine is an old unit for sure.

 

I got the 8739 for $60 it will be in action soon