Looking on the Jalpa site the rears specify minus 40mm offset. Is that right?

Front
7 x 16 inch, ET 0mm
distance tire/fender:
outside: 3 - 4cm
inside: 1 - 2cm

Rear rim size : 7.5 x 16 inch, ET -40mm
distance tire/fender:
outside: 3 - 4cm
inside: 1 - 2 cm depending on inner fender

Wheel Hub : Center: 70mm
5 x 120mm (BMW)