I purchased my 79 camaro with a 383 stroker crate motor 3 weeks ago. It ran fine even on extended drives until the other day. It began to idle rough so I barely made it home where it stalled and now won't start. The engine cranks but just wont fire up..

It has a Holley Sniper EFI system on it. The display reads stalled by the RPMs. The guy I bought it from gave me better spark plug wires and said I should replace them. So I will do that. Any other recommendations? The motor has under 1000 miles on it and is tuned

 

Welcome, tron, to the club.
As an assistant cranks the engine, you might spray into air horn of throttle body with starter fluid.
If she starts, fuel problem, no pressure from pump, no power to pump, clogged filter/pick-up screen, bad gasoline from station, no distributor pulsing to PCM for injector pulsing, no spark either by no power to module, bad module, distributor cap has carbon tracks inside,
Just a few suggestions as other members may have more to check.

 

sounds like you run outa gas,,, ^^^ do what Everett said.