Car died for 20 min after a few bouts of hard acceleration

I see it's a 67 barracuda
You say it has a 273 commando engine

But we need more info...

What modifications to the wiring?
What ignition system?
Mechanical or electronic fuel pump?
What carb?


It has been my experience that delayed restart is due to overheated electronics

Once they cool they are fine for a while.

Mid 70s Ford electronic ignition boxes were notorious for it.

If it's points check that the ballast is wired correctly so after starting it is getting less than battery voltage.


So based only on your description,

Point ignition...

1. Look at ballast for correct wiring.
2. Swap in a known good coil
3. Swap out the condenser

Electronic ignition...

1. Look at ballast for correct wiring
2. Swap out a known working ignition module