Its a pity that you can't find a tyre that'll look correct with that body.
35 profile tyres, IMO, look a little wrong.
You could have gone with 15" rims and used some historic rubber, though they are obviously not road legal.
You might find that Yokohama do a 315 in their A032R range. If so you have a semi competition tyre that's road legal.
Check out
www.tirerack.com
You'll find all the tyres you could ever want!
Regards,
J.P