Anyone have MSD Problems?

I have a MSD 6AL box on my 88 LX. Anyone have a problem when your car gets to operating temp and shut the engine off, it won't start back till it cools down? I've had this problem for a bit now, a friend and I went thru everything in the car. Well it turns out when I drove it for a bit, got it warmed up, turned it off, it wouldnt fire up. When I unpluged the MSD box and put the stock harness back on the coil, it would fire right up. Let me know if you've heard of this prob. Thanks!
 
MSD 6A & AL's plain and simply put... Suck. They are very old technology and are known for having a tone of reliability issue's. Forget MSD and invest in a good Crane HI-6 Ignition... You just can't beat the quality and performance of Crane Ignition product's.

Shon