2 things

cbig1969 said
It is a 1972 340 4-barrel, 3-speed manual, original engine and trans

If you have electronic ign, check the reluctor gap in the distributor and get it to .007"/.008" with a non-metallic brass feeler gauge.

I had a new one that was .030" and it would start cold, not hot. After adjusting the reluctor gap, never had a starting issue again....