My 67 needs front disc brakes and have some questions.

[72farmer]

I would like to keep the 6 lug bolt pattern.When you buy a 6 lug kit does it make your front tires wider apart?What about if you go to a 5 lug from a donor 71-71?Why can't you use everything from a 5 lug donor except find a 6 lug rotor?Reason i ask is i have a GMC donor but i would have to have 2 new 5 lug chrome ralleys and try to find them to match rear 6 lugs.