12 volt conversion
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Senior User
Joined: Dec 2001
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From: Michigan
12 volt conversion
Just finished converting my 51-F1 to 12 volt, what a difference. Just hit the starter button and she starts. Take her out at night and you can see where your going with the new headlights. 
Switched the gages to TPI Instrument 5inch quad units with electronic speedometer. The gages fit perfectly into the dash. Had to use a GM pulse generator from TPI for the speedometer. Screwed it onto transmission speedometer output, ran a couple wires and it worked perfect.
Hardest part was making the gas sending unit fit the existing gas tank opening.
Changes all the bulbs and added a new ignition coil with ballast resister.
Now all i need to do is find a 3:50 rearend to replace the 4:27 unit. Anyone have a rear from a 72 or earlier F100.
Switched the gages to TPI Instrument 5inch quad units with electronic speedometer. The gages fit perfectly into the dash. Had to use a GM pulse generator from TPI for the speedometer. Screwed it onto transmission speedometer output, ran a couple wires and it worked perfect.
Hardest part was making the gas sending unit fit the existing gas tank opening.
Changes all the bulbs and added a new ignition coil with ballast resister.
Now all i need to do is find a 3:50 rearend to replace the 4:27 unit. Anyone have a rear from a 72 or earlier F100.
