What a bad coil?Ive come across same symptoms and that was the case.

 

The car starts fine when cold. If it was the coil it would be the same symptom when it was cold. But, just to make sure, use that same multi-meter and check the DC voltage at the coil when it is hot. It should be just under 10 volts DC.
So, there you are. It is most likely one of these guys.
1. Timing too advanced
2. Vapor Lock
3. Hot starter
4. Bad coil.

Let us know which one it is.

 

WOW 400 amps. Doesn't that seem super high? I don't think my multimeter will measure that. What should a normal draw be?

 

OK. I measured the volts at the coil when cold and when hot,it is measuring approx. 4 dcv.

Also I don't have a meter that will measure 400 amps. Max is 20 amps.

Please comfirm units of measurement.

 

Run, don't walk to the nearest auto supply place and get a new coil. You found the problem.

 

K, I just bought a new one with 2 minutes before they close. I will install it and see how it goes

 

Damn it ALL.....I changed the coil and its still doing it..!!!!!

 

Going back to my original post. Do you have a spacer under your carb? And, check out that new coil. What are your getting DC voltage wise now? If still 4V then your alternator and battery need to be checked.

 

The coil shouldn't keep it from turning over when it gets hot. Since you backed off the timing, you are probably heat soaking that starter. Two fixes:

1. Build a heat shield out of thin aluminum between the headers and the starter (if you can)
2: Get one of the newer type starters that are much smaller than the original (if they make then for your engine)

 

It may very well be a hot starter, but I will bet that is is the most common problem with hot engines that don't want to start is that it is a vapor lock problem.