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1967 - 1972 F-100 & Larger F-Series Trucks Discuss the Bumpsides Ford Truck

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Old 01-31-2000, 08:38 PM
bigjohn bigjohn is offline
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70-72 disc brake conversion

What do I need to convert to disc? Where can I get the parts? Also I need an 8 ft. bed liner for 70 F-100. Anybody have any ideas? Thanks in advance!
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Old 01-31-2000, 08:48 PM
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70-72 disc brake conversion

Read the 65-72 Disc Brake Conversion article in the tech articles section of the site. It tells you everything you need.

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Old 02-03-2000, 10:17 PM
Trail_Rider Trail_Rider is offline
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70-72 disc brake conversion

Big,
Although I've read the article that Ken refers to I read after I made the conversion. Find a '73-'79 F100/150, and take the entire front end off of it. It's a bolt in swap. I did mine in one day. Make sure you get both I beams with all the braking system, the master cylinder to use as a core for a rebuilt, and probably most importantly the brake proportioning valve which is located directly under the m/c inside the left frame rail. When you take it off be sure you mark which line goes where. It's a fairly simple matter to swap front ends. You're going to have to replace the proportioning valve as the characteristics between drum and disk are different. It will work but it's going to have to be changed.


Jack your truck up under the frame.
Get another jack and jack up the axle.
Remove the shocks.
Remove the large nut inside the spring.
Remove the clip that holds the top of the spring in place.
Lower the axle to relieve spring tension.
Remove the spring.
Remove the spring seat (large washer) under the spring.
Remove the second large nut that was under the spring seat.*
Disconnect the brake lines. The disk brake lines are of a different design than the drum brake lines.
Remove your tie rod ends.
Tap out the bolt that holds the axle to the radius arm.
Remove the bolt that holds the axle to the frame.
It should be in your lap about now.
To take a phrase from Chilton's - Re install in reverse order.

* This would be a good time to replace the radius arm bushings. Take the big nuts off of the radius arms before you disconnect the radius arm from the axle.

It really is fairly simple. I put '73 F250 axles under my '72 F100. The only other thing I had to use was the tie rod ends on the F250 axle are larger in diameter that on the F100 axle so I had to use the F250 tie rod. I also used the entire braking system off the 250. m/c, power brake booster, proportioning valve. It was all a bolt in swap as the holes were already there. I did move the 73 proportioning valve onto the left inner fender under the m/c cause I didn't want to fight with it under the truck. When you see where the existing proportioning valve is and how much room is under there you'll see why I moved it.

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Old 02-03-2000, 11:02 PM
BigBrownTruck BigBrownTruck is offline
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70-72 disc brake conversion

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Old 02-12-2009, 08:39 AM
nice65trk nice65trk is offline
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Similar Questions

I know it's already been asked before but I wanted to ask you directly since your post deals closest to my question. I have a 65 f100 and i'm trying to convert drum to Disc(front). My donor truck was a 73 F100. I only took from that truck the spindles and braking components. I know you said to get the complete front end set up. My question would be is it still a direct fit with me only using the spindles and braking components from the 73? Do I use the 73 Kingpins and bushings set or use the 65's. I'm new at this but I've read many post and feel I can do this with a little help. I'm in the process of buying new calipers etc but wanted to know if at all the differences in both trucks. Thanks in advance.
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Old 02-12-2009, 08:58 PM
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I dont know how to answer your question but i know the disc brake conversion kit in lmc that i got listed 65-72 with the note that 65 king pins were different.
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Old 02-12-2009, 09:56 PM
vinlin95 vinlin95 is offline
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big john
i don't know where you are, but i have a front clip i cut off a 79 with everything but booster and m cyl.
located in southern illinois.
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Old 02-13-2009, 02:21 PM
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Quote:
Originally Posted by nice65trk View Post
I know it's already been asked before but I wanted to ask you directly since your post deals closest to my question. I have a 65 f100 and i'm trying to convert drum to Disc(front). My donor truck was a 73 F100. I only took from that truck the spindles and braking components. I know you said to get the complete front end set up. My question would be is it still a direct fit with me only using the spindles and braking components from the 73? Do I use the 73 Kingpins and bushings set or use the 65's. I'm new at this but I've read many post and feel I can do this with a little help. I'm in the process of buying new calipers etc but wanted to know if at all the differences in both trucks. Thanks in advance.

i did a little more digging. from what i found it looks like kingpin dia. changed in 75. so if you have a 73 it should be the same as your 65. kingpin should be from the disc setup as i believe its longer(but dont quote me on that)
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Old 02-13-2009, 02:21 PM
 
 
 
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