mate, i've been looking at buying wheels for my 68 for the last 3 weeks. i measured my wheels, and got a negative offset of 12 to 14 mm. the first issue is stud pattern, 120.65mm, the other is that most wheels have a positive offset between 25 and 45 mm. the best i can find so far has an offset of +15, these wheels are not factory drilled, and still i have to work out what exact adaptor plates size i need to get made ( ~ 30mm). so if the stud patern is same, good luck with the offset.