[400TT]

Paul, how about considering just narrowing the track of your CR? That way you can use cheap quality off the shelf pin-drive wheels from someone like Vintage Wheels US or someone else if you can manage their backspacing.

I just recently made pin-drive hubs for my Jag front end. By fitting larger brakes I was able to move my wheels in 30mm each side. I used 310mm rotors, 2 piston PBR calipers which all fitted under 15" wheels.

Then see what's involved in narrowing that rear end.

I expect Mike can explain the pros & cons of such work on a CR.

At least by narrowing the track you won't have the problem of the spinners sticking out like a Roman Chariot.

Just a thought, although maybe you have already considered this option.