Cruise control
#11
#12
I think you may have two separate issues with it. Mine began doing that when I started turning up the pump. It would also realize I'd reached a hill when I was halfway up it, at which point it had to hammer down twice as hard to get back up to speed. Then it wouldn't realize it was over the hill and cruising down the back until it was doing 30mph higher than it was set at. Annoying to say the least, more like cruise out of control. But as I said earlier, putting a restriction in the vacuum line to the cruise down by the headlight helps immensely, although I didn't do it myself and I'm not entirely sure exactly how my guy did it. But I think you have something else going on as well, because that dead spot is a new one to me.
#13