Are 1969 ford f100 and 1969 econoline front spindles that same?
I noticed the wheel bearings are the same when I purchased bearings for my truck.
There's a company that sells a disc brake conversion for the econoline that uses like 1995 crown vic disc could this be an easy 5x4.5 disc swap?

 

What is the name of the company?

 

No. The spindles were different part numbers.
69 E100/200.....C8TZ3105E..replaced by D2UZ3105A. Discontinued.
69 F100 4x2......C8TZ3105B..replaced by D2TZ3105D. Discontinued.

 

I was thinking that but could never dig up a part#.
Even if the wheel bearings and races are the same the spacing might be different.

 

This might not be dead in the water. If the difference is only the ball joint geometry you may still be in business. Look at the mounting pattern on the knuckle itself (which requires complete disassembly) and if that's the same as the truck knuckle it should be a go. Ask the manufacturer for the adapter plate mount dimensions and measure the mount points on the knuckle to see if it will fit. Then check the clearance of the disc to the knuckle. that's just go get one from the store and return it afterward.