rear disc brakes

[komninon]

maybe a stupid question.
I'm looking to get rear discs for my 68, and my friend told me, that would move the wheel 1/2 inch out.
is this  true? 
thank you, George.

[bull]

I've never heard that before, and I don't see how it could happen. The wheels bolt to the face of the axles don't they? How would disc brakes change that?

[Rolling_Thunder]

the rotor gets sandwiched between the axle flange and the wheel...   adding a small offset - the factory drum thickness - thickness of rotor = offset increase   I did them on mine but did not see a noticeable difference...    i think it was like 1/4" or something

[Musicman]

I would say it depends on the kit.... contact the manufacture.