Question on wheel spacer for rear when swapping in a low pinion DANA 44 w/discs

[Madman]

There was some info about this previously, but the search here is a bit FUBAR with it's time you need to wait. Anyways, I have swapped in a 76 low pinion DANA 44 with discs from a 76 F250 4x4 into my 1970 F250 4x4. I see the wheel width has changed versus that of the original rear, so my question is who has done the same thing and what size of a wheel spacer did you use (width)?

Thank you for your help!