I have a 61 Chevy Apache, the previous owner did not use a key to start the truck. When I got the truck the engine would start and run. The truck does not have the orginal engine, it was changed out to a 350. I removed the ignition switch (marked all wires for reinstallation) and had a key made. After reinstalling the ignition switch the engine will crank and fire as long as the switch is in the start position. When I let go of the key the engine shuts down. I have discussed this with the locksmith and he has no idea how keying the lock would effect the switch. The previous owner has butchered up the wiring and it is a mess. Thought I might have reinstalled the wiring incorrectly and did some trouble shooting. I discovered the wire to the soleniod was hot so I switch it with the battery wire. The engine cranked but did not fire. I switched the wires back and the engine craned and fired but shutdown when I let go of the key. I would appreciate any help I can get on this matter. Thanks Redo