Trying pulling a few plugs when it dies, see if they are wet with fuel. Choke is staying open right? I am interested in how long you must wait for the thing to run again. At that point make a note of the temp then try to repeat that same event. Run to 180 car quits, cools to whatever and runs again to 180 and quits. Odd for sure, with machines there are always new things to learn. MSD will also show how to check the trigger btw, their product of course but the operation should be similar.