1968 Barracuda fastback cloning to 340 4 speed

I have the factory manuals. Went through the grounds as well…. Original ignition switch. I suspect it’s bad due to other issues and gauges not working prior to the exchange of 69 parts. Easy way to find out I have another 68 ignition switch. Just have to drop the ac vents. Also have to place the speedo cable back in I missed aligned it when reinstalling the gauges. Thank you great advice to refer to.