I have a 1966 Mustang with a 289 engine and automatic shift. My Park/Neutral Safety Switch is intermittent and I need to know how to access it so I can change the switch. Your help is appreciated.
Lawshe

 

It is on the transmission where the linkage goes throught the case.

 

Might just need adjustment

 

Yeah, the mounting holes are sort slotted, so you have a couple degrees of adjustment range. They are easy enough to take off, just be careful not to FORCE the "drop down" shift lever that goes through the middle of the shaft. I just changed one cause the backup lights wouldn't work, and shorting the pins on the plug on front of the firewall lit them up. Any of the mustang catalogs carry the item. It's in the 30 to 40 dollar range.