Hot Rods F100 I-beam spindles on F1 straight axle

Have a set of 1974 F100 disk brake spindles on my 1965 F100

Would like to use them on an F1 axle instead of buying a disk brake kit for the F1 spindles

I have read the F1 axle has .8125 king pins on an 8 degree inclination
.. and that the F100 axle has .859 king pins on 4 degree inclination

Is there enough material there to do this or will a bushing or such need to be made

Perhaps bore f1 axle to .859 and bend to proper inclination ??

Also, why the difference in king pin inclination ??
Is one more suited to modern roads or such ??


Ricky.

 

I would rather have the 8 degree KPI with 10 degree positive caster...