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Ok My original question was this
I have a 68 F100 put under the front end a 70 twin I beam with drum brakes.I know a guy that has a 71 F250 disk break setup! Want to know if I can put the spindles and calipers on my front end? I also want to keep my 15 wheels and want to know if 15' rotors will work on the 250 spindles or will I run into clearence problems on the 15 rims and calipers also does anyone know what bearing would work for this swap?
First post I did disappered, must have done something wrong sorry if it is considered a double post!
I think the f100 and 250 spindles are different. You can just swap Ibeams. Measure the rotor and caliper diameter and then measure the inside of you 15's and see how much room you have. I think you might have to use 16's. Sorry, I don't know what bearing you are talking about. There are wheel bearings inside your hub. Try there.
if I were you I'd just source an entire frontend (suspension and steering) from a 73-79 f100/150 with disk brakes, and get all of the brake hardware along with it. it is a 4 hour swap (if everything goes well) and no need in changing wheel size. trying to change the spindles is ALOT of work, and you'd be better off going this route. do a search on this brake swap on this forum, and you'll have hours of reading material.
I also want to keep my 15 wheels and want to know if 15' rotors will work on the 250 spindles or will I run into clearence problems on the 15 rims and calipers also does anyone know what bearing would work for this swap?
No. The caliper from a F250 barely allows room for the rim of a 16" tire. And the F250 is a 8 bolt pattern not a 5 lug like the F150.
Go with MacOffutt's lead for this conversion.