Starter Woes - Won't stop

[Rolling Thunder]

I need some help with a problem I can't figure out. I've got a 351 Cleveland in my Cobra. Owned it for three months now. No problems until a couple weeks ago.

While trying to start the car, the starter would continue turning over, even after releasing the key from the start position to the run position of the ignition switch. More confusing is that I could turn the switch to the off position and remove the key completely and it would still keep turning. This all without the engine ever firing up. The only way to get it to stop turning is was to use the kill swith.

Thinking my ignition switch went bad, I bought and installed a new Lucas replacement (good thing Superformance is less than an hour away!). That got the car starting and the starter stopping with only a couple short recurrences after installation, but now, about a week later the problem has returned.

I don't get it. The starter should only turn if there is power to it, right? If I turn off the ignition and remove the key, shouldn't that cut off all power to the starter?

I don't understand what the problem is, nor how to fix it. Any help would be greatly appreciated.

Thanks,

Keith