I had successfully engineered and installed an intermittent system on my 1956 F-100 truck several years back using a wiper motor from a 1979 Ford pick up. I had an extra wiper motor from a 73-79 Ford pick up in my shop, so using it for a comparison I removed the Falcon wiper motor and compared the two. To my surprise the two motors had the same spacing on the transmission mounting bosses. The mounting bosses on the truck was slightly larger but still close in size. With this discovery I went to my local Pick and Pull junk yard and found a donor truck for the intermittent wiper switch and governor. Any Ford truck from 73 to about 84 or 85 should be a suitable donor truck for the switch and governor. As for the motor I think there was a change in 1980 and the later wiper motors may not work. I would stick with a 1973 to 79 model for that. By the way, all wiper motors either intermittent or non intermittent are the same in these year trucks, it is the switch and governor that make the difference. When you remove the wiper motor from the donor truck be sure and keep the longer bolts that attach the wiper motor to the mounting plate.
To affect the installation you have to remove your old wiper switch. When you remove your old switch be sure and save the bell looking spacer that is on the back side of the Falcon switch, you will need it. You will find two wire plugs on the Falcon switch, one is a single wire and is orange in color, this is your hot wire. It is hot when the ignition switch is turned on. Make a mental note of this wire because you will need it later. The other plug that attaches to the switch contains four wires and all four go into the 14401 or main wiring harness and come out at the pigtail for the wiper motor. You will not use either of these plugs again so tape them back out of the way someplace. With the Falcon switch removed, take the truck wiper switch and compare it to the Falcon switch by holding them side by side. I added two flat washers and then installed the bell spacer to the truck switch and installed it just as the Falcon switch was installed. You will need a bezel wrench to remove and reinstall the wiper switch.
Once you have the wiper switch in place, remove the Falcon wiper motor. After you have the falcon motor removed you will next remove the bell crank. You will use this bell crank on the truck motor. Make a mental note of the position of the truck bell crank before you remove it. When you install the Falcon bell crank you will have to index it 180 degrees from that of the truck bell crank. This is important and you must do this if you want your wipers to park correctly. With the Falcon wiper motor removed from the falcon motor mounting plate, and the bell crank installed on the truck motor you will install the truck motor on the Falcon mounting plate. As I mentioned earlier the bosses on the truck motor are slightly larger than the Falcon motor mounting bosses. Set the motor in place on the rubber grommets and start the longer truck bolts on the back side of the mounting plate. Slowly and evenly tighten the bolts until the wiper motor seats into the plate. If the motor starts to tear the gromets, libricate them and it should slip right in. Snug them up and reinstall the wiper motor and mounting plate just as it was originaly installed.
You will notice that the truck wiper motor has it own wiring harness. Thread the wiper motor wiring harness back over the top of the brake and clutch pedal support to near the switch. You will now install the wiper governor. I installed mine on the side of the pedal support, it will have to be installed near the switch, be sure and attach any ground wires too. The governor has two pigtails coming from it. Plug the wiring harness from the wiper motor into the black governor pigtail and the red pigtail plugs into the wiper switch. In the wiper motor wiring harness you will see an orange wire coming out of the harness and terminates into a single plug, clip the plug off and install a male spade connector to this orange wire and plug it into the orange hot wire that you removed from the original Falcon wiper switch. This is a clean and effective way to install intermittent wipers on your car. You don't have to cut any wires on your Falcon or do any metal hacking, it can be converted back to original should you ever sell your car to a purest. If you have any questions on this installation, or any of my other modifications please feel free to e-mail me.
This is for reference only. People's mechanical ability varies and I can not be responsible for someone elses inability to affect the change over properly. You do so at your own risk.
