1992 Chevy Caprice car stalls when warm, wont start until c

Engine Performance problem
1992 Chevy Caprice V8 Two Wheel Drive Automatic

I have a 1992 Caprice with a 5.0 motor. The car has started to act up. It will run fine when cool, but when it warms up, it runs rough and stalls. When it stalls it doesnt start until cool. While turning over when warm, I notice the motor seems to catch, then turns over again if you release key.