Dan,
What is the width on those babies?? I'm running my original 4.5x15" wheels for the street they are laughably narrow but I'm running 195's on them. I love fuchs, but they didn't really exist beyond the 4.5" 'S' version, so I definitely embrace the old steelies! I redid mine and put them back into use after 30yrs of sitting idle. I was inspired by a picture of the old London-Sydney rally car. Vintage rocks!!
Also per my PM here's my seat/belt set up.