Lauch limiter and shift light options?

70aarcuda said
http://www.summitracing.com/parts/MSD-8963/

bought of one these for our 71 Dart....very nice...not cheap...

70aarcuda said
if u r going to use a msd 6al...just get a two step or three step..to plug into the msd..

that little light is expensive! but it might be cheaper than getting a rpm switch and a light...

and the separate 2 step things seems to always have a computer plug... are they also set up with wires? or what? never had/seen one up close...