Can I use F Body spindles?

I would like to start getting parts ready for a BBP disc brake conversion. I have heard some debate on using the F body spindles. I have a 77 Aspen in the yard I can take parts off of and if I can use those spindles I will.
Do I still need 73+ UCA's or can I use the F body ones?
Can I really use the F body spindles or should I be looking for A body spindles?
What else do I need?
thanks.