stalling at speeds over 65MPH
I see this is an old post, but I had a very similar problem with my '97 GC several years ago. At speeds of 70 mph, it would stall out completely. After sitting for a minute, it would start and run fine. My mechanics looked over everything and couldn't reproduce the problem. Finally one of the old mechanics at the shop said " it's the distributor cap". So this being not much of a risk, I had it replaced and it fixed the problem since. So guys out there, this may be one of the fixes you need.
I have a different start problem now.