[Steeveedee]

The relay is probably sticking if it is a mechanical(?) one. Depending on where its power comes from there could be feedback from somewhere else. If it's mechanical, tap it after you shut the engine off and see if that kills it. I'd also check to see if it has a small amount of power to it when the engine is off, before starting it, say, in the morning. I used an aftermarket starter solenoid from the four-letter car factory. If you look at your fuse box, there should be an "Ignition Unfused" slot that you can run power through to an HEI that eliminates all that relay business. I learned that one here on this site.