Disc brake conversion for '66
New User
Joined: Oct 2013
Posts: 7
Likes: 0
I just recently decided to convert my 66 f 100 to disc brakes. I found a 79 f 100 to pull my parts from but the truck was wrecked so I can only pull spindles will I be able to change kin pins. And keep the 66 I beams. I read one forum that said NoProblem. 1 that said different size king pin would not work. Appreciative of any help.
Fleet Mechanic
Joined: Oct 2007
Posts: 1,973
Likes: 104
I paid $800 for a 75 100 with a 390/3spd, ps, pdb, and a bunch of new parts.
The PO had plans to do a "restore" but got fed up and sold it all.
I sold the new fuel tank, fuel lines, and Holly 750 for $250 and the carcass for $200 after I pulled the engine, tranny, PS, and PDB. I also got a new uninstalled LMC dual exhaust system.
BTW: LMC is the last place I would buy a F100 exhaust system. I paid $75 to have it installed, the shop had to do a bunch of cutting and welding to make it fit. There's no way I could have done that in the driveway.
So parts truck are out there, you just have to spend hours looking and be patient.
The PO had plans to do a "restore" but got fed up and sold it all.
I sold the new fuel tank, fuel lines, and Holly 750 for $250 and the carcass for $200 after I pulled the engine, tranny, PS, and PDB. I also got a new uninstalled LMC dual exhaust system.
BTW: LMC is the last place I would buy a F100 exhaust system. I paid $75 to have it installed, the shop had to do a bunch of cutting and welding to make it fit. There's no way I could have done that in the driveway.
So parts truck are out there, you just have to spend hours looking and be patient.
Fleet Owner
Joined: Jun 1999
Posts: 24,552
Likes: 74
From: Creedmoor, North Carolina
Kirby, You can connect it all up as one piece. I parked the 76 donor beside my 66, dropped the I-Beam set slid it under the 66 bolted it all up and drove it away.
The king pins are a different size that need a little work to make work.
It has been a few years now, but I sold my donor parts for more than I paid for the truck.
John
The king pins are a different size that need a little work to make work.
It has been a few years now, but I sold my donor parts for more than I paid for the truck.
John
Laughing Gas
Joined: Sep 2012
Posts: 860
Likes: 13
From: Asheville, NC
I just recently decided to convert my 66 f 100 to disc brakes. I found a 79 f 100 to pull my parts from but the truck was wrecked so I can only pull spindles will I be able to change kin pins. And keep the 66 I beams. I read one forum that said NoProblem. 1 that said different size king pin would not work. Appreciative of any help.
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New User
Joined: Oct 2013
Posts: 7
Likes: 0
I used a 79 F100 to get the disc brakes for one of our 66 F100. I used a 1979 king pin set as the pins are a bit longer so you have more kingpin in contact with the spindle. The 66 king pins will work, but have less area of contact (yes, I put one side together twice to compare 66 vs 79 king pins)
Fleet Mechanic
Joined: Oct 2007
Posts: 1,973
Likes: 104
I think the cut off on 1/2 tons is 1974.
65-74 I-beams and spindles will interchange, wile 75-79 interchange.
As many have said, its much easier to keep the -beams and spindles together, but if you keep your 65 or 66 I-beams make sure you use 67-74 spindles.
65-74 I-beams and spindles will interchange, wile 75-79 interchange.
As many have said, its much easier to keep the -beams and spindles together, but if you keep your 65 or 66 I-beams make sure you use 67-74 spindles.
Laughing Gas
Joined: Sep 2012
Posts: 860
Likes: 13
From: Asheville, NC
We jacked her up this weekend to change oil and service. We greased the kingpins, u-joints, adjusted parking brake, checked for play in suspension and wheel bearings, etc.; everything was in tip-top shape. Maybe I just got lucky, but all seems to work just fine. Maybe I should check the part #s on the I beams and spindles to confirm they match a 66 and 79, respectively (are would they not really be part #s, but casting or machining #s?).
Ford Parts Specialist
Joined: Nov 2006
Posts: 88,826
Likes: 785
From: Simi Valley, CA
FoMoCo didn't offer swaybars for F250/350 until 1973, didn't offer them for F100/150 until 1975.
If you find front and/or rear swaybars on 1972 and prior year F250/350's, 1974 and prior year F100's, they're aftermarket, installed by front end shops and RV dealers
If you find front and/or rear swaybars on 1972 and prior year F250/350's, 1974 and prior year F100's, they're aftermarket, installed by front end shops and RV dealers