I like the bit in the advert for the mx250 with the mentl interior that says he hasnt got the money for the '2' things that make it a 60s racer! I think hes a bit far off the count with 2......
Get the paint looking right and a better choice of wheels / tyres it would be an easy "fix". Depends how well its been put together I suppose and not much info regards the donor Z3 so who knows ?