Vapor lock?

I hav
Dana67Dart said
Next time you suspect it might act up, look down the carb and move the throttle to wide open you should see a good shot of fuel from accelerator pump.

If you do you have fuel in the carb.

Have you checked that the coil is getting battery voltage during cranking and post ballast resistor voltage (about 8 or more) volts during run.
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I haven’t checked the coil because it’s a brand new (well less than 500 miles new) msd coil. It sits where the stock coil sat on the intake manifold. Will check the carb next time i try and start it back up when it’s at operating temp.