CIP1 has a wide range of fake 5 bolt 5x130mm Fuchs and they state the offset. Available in 15, 16 and 17" diameters. They also have rotors and drums drilled for the Porsche pattern. You still have drums on the front - I would buy a kit to convert front to discs (going with the 5 bolt Porsche pattern) and just purchase redrilled rear drums (unless you want to go with discs in back - with emergency brakes). 80% of braking is in front so best to start there - but of course, 70% of the weight is on the rear. I'd also look at adding front anti-sway bar (requires mod to bumper bracket) along with one in the rear.
Disc brake example - https://www2.cip1.com/ProductD...Code=ACC-C10-4121-BO
Wheel example - https://www2.cip1.com/ProductD...uctCode=C32%2DFU552C
There aren't many alloy 4 bolt VW wheels available wider than 5.5" - I'm guessing you'd want 6" or even 7" wide (in rear).
Ask your dad if he still has the fiberglass splash fender panel that fits on either side to hide the bumper bracket (provides strength and protection too).
