Ok another bridge to cross. I have a 66 c20 cab that is now on a 63 GMC 2500 chassis. Cab had mechanical clutch linkage, chassis hydraulic. I drilled hole in firewall to accept dual purpose clutch/brake master. I have the rod for the clutch to use that was with the chassis. But the clutch pedal pivot is way to long. Not to mention, is "keyed" to only fit one way, My question is, What do I need to make this work properly? Pics attached....