Stumped with running issue

[Wwes]

350 TBI....I've got a problem hope someone can help.

This has happened 3 times..cold start is fine.

Warm engine, shutoff for an hour or two.

Turn key and engine hits like it will start, but stalls. Then just cranks like it has no spark.

I checked spark plug, has spark while cranking on #1.

Watched fuel jet out of injectors while cranking.

Both prior times, when things cooled down it started again. Today, I ran the battery down cranking and no start. This has happened with two separate distributors.

Ideas?