I agree - although from an engineering point of view I don't like "wobble" bolts they will work. The offset of a wheel from a front-wheel-drive car is likely to be very different from that of a rear-wheel drive car.
I did buy the wheels today, they were too good to turn down!
They are Schmidt TH classic wheels very similar to older alfa gtv wheels but in chrome and polished. 7.5" front and 9" rears should look good once fitted, I think I will get hub adaptors to fit them properly.