Whats happening here

[captonzap]

Originally Posted by William Kelchner

None of this started until I decided to get the rebuilt dist with original hardware.

Ah ha! Now we're getting someplace. If it started having problems with the "rebuilt" dizzy, the odds are pretty good that the problem is in there. Who rebuilt it? Do they have a track record of good work, or was it the Shadetree Shop run by the kid fresh out of Auto Tech?
As has been suggested, calm yourself, take the dizzy apart, piece by piece, and look at every small detail.
Shaft bearing tight, both ends.
Wiring insulation unbroken or bare/ frayed?
Points not pitted? (Over or under capacitence)
Rubbing block loose
Most problems are pretty obvious, visually, if you know where to look. The trick is to look at everything as a potential problem, and see if it indeed is.
And not "yeah, the cap is on right".
Is it cracked, or have carbon tracks?
Or "Oh yeah, those are the points, they look OK".
Are they pitted, spring weak, smoothly working on their pivot, wire connection tight and wire away from any potential contact with ground?
And the fact that it works for a while, and quits when the heat goes up, would suggest that thermal expansion might be a factor. Look at what might expand and short the electrical flow.
What ever you do, don't let it be said that a machine got the best of you.
Troglodytes have that niche covered.

CZ

p.s. And be sure to let us know what the problem was, (that means you found it), as there is some heavy betting going on out here.