bypassing interlock system

I would not in any means recommend bypassing the transmission neutral saftey switch if that's what you mean. It's a simple job to fix it. It's probably either a bad neutral switch or the shift linkage is out of adjustment or could even be a bad ignition switch. Next time it happens try putting it in neutral with your foot on the brake try starting it. If it starts it's probably the neutral switch or linkage adjustment.

When I bought my 68 Cuda the idiot that owned it before me had the neutral switch bypassed and I didn't know it. I was installing a stereo system in and put the shifter in low to get more room to get at the stereo and forgot and left the shifer in gear and started it up. Just about went through the back wall of the garage before I got it stopped. Good reason to NEVER BYPASS A SAFTEY SWITCH!! What's worse is my wife could have been in front of it when it happened. Thank God she wasn't.