G-rag

i have replaced all the fuel related items and still having problems. The engine starts runs for 20-30 minutes and then dies. Then I can't start it again for almost an hour. Replaced the fuel pump relay it's still doing the same thing. Any ideas on what's going on here?
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1970cs

Does it fire off of carb cleaner? Could be a possible coil problem with starting/dying and then needs to cool down in order to run again.

http://easyautodiagnostics.com/gm/2....n-coil-tests-1 this not 100% of what you need but should be able to walk you through diagnostics.

FYI cutlass

Pat