With 7et42 wheels, you will have no problems in the back (drums).
In the front, with drums you will have to narrow the beam 2". With dropped spindles and disks, you may be able to get away with the 2" beam, but I'd do a 3" beam to be sure. It definately will not fit with a stock width beam.
There isn't any offset difference between drums and disks (the regular Karmann Ghia disks). Dropped spindles add about +.25" (CB style) or .50" (welded style) per side.
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