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If you want all new stuff, there are kits availible, but when I priced them out they were in excess of $1000. I did my conversion for less than $500 in brake parts and you could prolly do it cheaper...
the main thing is my safety, my parents are making me put some on my truck, they said they would pay for em but i have to do the research so im looking around
Nitro -- got your PM requesting a "list" of parts. Like ddavidv says -- check out that site, and read the article on disk brake conversion right here at FTE. You'll get the idea.
You need for sure:
Spindles
Prop valve
You ought to get:
brake booster
master cylinder
You might want to get, depending on your approach to the conversion:
The donor Ibeams and radius arms
brake line brakets from the frames (the hard lines end in a different location on later trucks)
brake pedal assembly and stop light switch from inside the cab.
You need to read more which approach you will be taking.
Disc spindles in 5x5.5" pattern are generally usable from 68 to 79. The early F100 spindles may be a little lighter weight. The later F150 are heavier. There are rare dual caliper "camper special" spindles too. If, perchace, you want to keep your stock "bottle cap" hub caps, this may be an issue, in terms of clearance and rims. IF you are wanting to go later, aftermarket spindles, then you have no trouble.
Prop valves are available new, but cost like $125. Much cheaper to get at junk yard and usually don't wear out. If mom and dad want best safety, then power brakes are good idea. Pick up a booster and master from the donor -- then use them as cores to exchange for new stuff. Don't try to re-use the brake calipers -- don't pay more than $10 for them at junk yard as their core charge is pretty low, like $8 or so.
A disc brake swap is a great way to get to know your old truck. I hope you have some tools or a friend that does.
Use the "search" and read up on this. It is not a conversion that you can do with the same tools that it takes to change the oil. But it is doable for most folks and pretty much everyone willing to drive a 40 year old truck should be able to handle it.