Gerry, if we can arrange for a few cars to be at the same place, we can test fit tires and wheels. I know Gary, Alan, Mirko, and Darren K all run P pattern with VW short axle swing. I've got both 215/60s and 225/50s mounted on 8\" Fuchs that could be tested on their cars for fit.
Alan has run 225/50/16s on 7\" Fuchs, and is currently using 205/70/15s on 7s. The 8s have the extra inch all on the outside. Maybe Alan can tell you what clearance he has.