i had exact the same with my 66 mustang. no cranking anymore when engine was hot, had to wait 20 min and car started again. the starter has worn out cause of the heat impact of the headers all those years... a heat shield didn't help anymore,  had to replace the starter and problem was solved.. 

You might consider using a Ford solenoid system which I have on my Vette/truck.The thing you have to be sure about is the grounding of the solenoid as we don't have an abundance of metal under hood in Vettes..I have this set up for 5 years on  "lame" starters on both my Vette and '72 C10 truck..With this set up the staret never has 12 volt to it until you try and start the vehicle,meaning the heavy gauge wire/solenoid is cold and not hot from headers..        nosa1       Sal C 

Did you go right through all the electrical connections?  Ensure everything is clean, battery terminals included, earth straps etc.   A new starter and solenoid shouldn't give issues....

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Had the same problem, have power but not even a click, replaced starter and solenoid and new wiring harness to starter. Same problem. Got a new anti theft relay and wile I was installing it I just unplugged it and tried to start the car. Acted just like my problem. Installed the new relay and it started right up. Unplugged the alarm module and will see if that was shutting off my relay! Update, relay was not the problem finally got it hot and same no click issue. Checked the purple wire going to starter and it is getting current when I hit the starter on the key. So it is the solenoid ! New starter and solenoid, with heat shield and wrapped the header pipe. Looks like the remote solenoid or high torque starter is the next step. Already replaced the wiring harness to the starter so I know that is all good.

|UPDATED|10/10/2018 2:27:56 AM (AZT)|/UPDATED|

Before one starts to wholesale replace parts, one needs to check for voltage at the starter and solenoid, and at the other points upstream to see where they're losing voltage if it isn't present at the starter. Otherwise you're just throwing parts at the problem. This could be a very expensive way to troubleshoot a problem. One can get a digital VOM at Harbor Freight for less than $10. A small investment that will pay itself off many times over.

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1973 L-82 4 spd

This happened to me in my 1982. For weeks/months I would venture out for a drive, maybe stopping later on for a drink, or to fill up. All done, ready to go, boom...no start. Waited about 30 minutes every time, then it would start.







|UPDATED|10/1/2018 5:02:45 AM (AZT)|/UPDATED|

  


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Joel Adams
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"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"

Good new, finally was able to solve the problem. First I replace the starer/solenoid, wrap the exhaust pipe near the starter. When for a test drive and upon my return turn off the engine, waited for about 5 minutes, the engine started. Decided to waited additional 5 minutes to make sure the first time was not fluke. To my surprise, the engine started again. Looks like I can get on the road again without worrying if the car is going to start. Thanks to everyone for their input.

Waiting is not a good test. Waiting gives the starter time to cool. Test it immediately after shutting it off. If it still starts good you are golden.

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Do it both ways, mine starts right up when hot but if it sets a few min the heat builds up and no start. New wires, new starter and solenoid and wrapped pipe with starter heat shield. Going to shield the wire and add additional exhaust wrap below the starter to see if that fixes it. I think the 82s and others with catalytic converters build a lot of heat right after they shut off and sit for a few min. Wait another 20-30 min and it starts right up!

Glad you seem to have got the problem sorted Johnny.

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