Looks real fine nath!
The corks on my very early Red are glued to the pulley too. I've not checked which way 'round my other red machines are (I've not had that area apart on any of them).
FYI the original engine pulley material is asbestos. I did replace one with cork once but never put it into service as I decided that this machine would be the donor. This was discussed on another thread just after I'd done it (a few years ago now) and Gadge suggested the cork wouldn't be up the task because of the higher operating speed of the engine clutch. I reckon he might be right .......but it costs nothing to try
I found 1/8" thick cork at the flower arranging section of spotlight. That's what I used on the engine clutch. No joke! .........just happened to discover it in a bored stupor while following the wife around.

I've attached photos of the wheels that might answer your question about dimensions. Apologies for not posting them sooner. My new iPad doesn't play nicely with this site when it comes to photos so I have so get the old one out to post images.
I'd forgotten that you'd asked for front end photos. I'll get those in the morning.
Not sure what your trying to show in the photos of the dog clutch.......
Well done on this machine!