Classic/Antique Car Repair: run till its hot, addvance, air cleaner

Question
I have a 78 link cont
runs ok untill it runs about 15 or 20 mins
then it shuts down and wont start till she cold again Ive tryed plugs coil condencer caberator roter cap thanks in addvance  

Answer
This may be either a fuel problem or an igntion problem, we need to sort out which.

The next time this happens, loosen the lid on the air cleaner and put about 2 ounces of gas down into the center of the air cleaner lid so it can run down into the top of the carburetor, then put the lid back down tight.  Now try to start the car.

If it will start and run, even if only for a few seconds, you know  your problem is lack of fuel.  

If it won't start even with gas fed to it this way, the problem is probably ignition.   Your car has an electronic ignition module - you may have to just take a chance on replacing it - I doubt you have any way to test it.   These are famous for crapping out when they get hot.

But be sure it is an ignition problem before you spend more money fixing the wrong things.

Dick.