Hey guys until 91 the boxes were private labeled with GM /Ford
and the parts catalogs for both had HD CD ignition listed and they were different color but were really MSD 6t's and soft touch rev control s marketed in this way to be legal in cup racing ,, in 91 they said run the red boxes and now you can see the MSD red boxes /the old GM boxes are worth alot
just an interesting fact to some !!

They are good people at MSD and as I've said everything breaks but I have never had any problem getting them swaped out for free or 50.00 bucks ,,,if you get a problem with them and the sales guy won't help get a manager they want you to be happy and the stock I have in MSD to go up ,mo-power says I have LMAO

You do have to run the proper coils and wires as on most boxes
or your going to have problems

Yeah Bobby,
My buddy with the engine shop who sends a number of MSDs to Nelson Specialties for upgrades , bought a three of them outright from Nelson and two of the three came in the GM aluminum case. My bud didn't care because he knew what was inside( coming from Nelson).
That was the first time I made the connection between the two

thats cool the GM boxes are hard to find and becoming very valuable in this part of the country .
Yes Nelson does some great work on MSD and alot of neat upgrades