MSD 6AL Over heating issue

[ROKN69]

Hello all,

I have an MSD 6AL that I purchased new from Summit Racing a couple of years ago, along with a Blaster 2 coil. The problem I'm having with it (relatively recently diagnosed) is it is overheating and causing the engine to stumble and die. At first I thought the problem was other things, such as carburator issues, other electrical issues, etc. I worked on resolving those issues for quite a while before I had it pointed out to me...

I was at Sacramento Raceway in November of last year and two guys there were having similar issues - both were 65 Mustang guys. Both were really NICE guys, too. Anyway, one of them suggested that I put a bag with ICE on the MSD box, and whalla! The stumbling and stuttering issues went away in about 3 minutes. We figured it was because of the mounting location (high up on my firewall with the headers down below it) and that heat from the headers was causing the unit to overheat.

So, I moved it to up behind the right headlight (my battery has been relocated to the trunk) where the battery would normally be and it's still overheating. I had someone else mention that it could be improperly grounded, so yesterday I had my wiring guy rewire the negative ground directly to the negative battery cable (which ends at the Starter). This seems to have helped a "little", but last night in 87 degree weather, idling in a McDonnald's drive through line, it overheated again! I was in line for about 15 minutes, but still, my water temperature was 180 the entire time, and it was not "hot" out.

I've been asking around at various events and found that I'm not the only one having these overheating issues with their MSD boxes. Both of those Mustang guys bring ICE in bags so they can ice down their MSD boxes, between laps. This to me doesn't sound like it is the way it should be. I'd like to have mine fixed, RMAed, or whatever.

Does anyone have any experience with this sort of thing, with their MSD box? If so, how did you get it resolved?

Thanks for taking the time to read my lengthy post, and I appreciate your help.

--Roger