Yesterday was the hottest day this year so far.  Temps in the mid 90s.
I went to town, made 3 stops, and at my 4th stop, the car sat about 15
min.  I got in the car, pulled out on the road and had to sit a few
minutes for traffic.  When it was my tuen to go, I stepped on the gas
and the car just died and would not start.  I pushed the car back into
that lot and waited about 40 minutes.  I got back in the car, it
started, but it died as soon as I put my foot on the pedal.  I costed
back into the lot and parked it.  About 7 hours later I finally found
someone to pull it home.  By this time the temps had dropped 20
degrees.  When we got there, I decided to see if the car would start.
It started and I drove all the way home, with my helper driving behind
me.  

This is a 89 Chevy with the "olds" 307 engine.  Automatic / carburetor

I suspect vapor lock, although I never had it before.  Of course I
know that different kinds of gas matter.  

What gets me is that when it died the second time, I pumped the gas
pedal very much.  I smelled gas, but the car would not start.  The way
I understand it, vapor lock means no gas is getting to the carburetor.
Yet, I smelled gas.  So, how can it be vapor lock?  I looked down the
carb and could see gas shoot in the carb when I hit the gas pedal
linkage.

This car has electronic ignition.  I was told those modules can
overheat???????????

It acted like it ran out of gas when it died.
(No, I am not out of gas).  

Anyone have any ideas?

Thanks