Here's a pic of the roller assembly after I cleaned it up. There are some light grooves worn in it. Should I replace it also?

To replace the rear clutch shoes it looks like you have to buy the whole assembly for ~$85. Ouch!

 

It seems to look fine.
If you have any pad left on the rear shoes, run em.

 

Really? There doesn't seem to be much left although I don't know what a new set looks like. How much more use can I get out of these?

 

They are not supposed to be groocved like that. sand em down with a course sandpaper using lil circular motions.
I think they have alot of life left in them.

 

I sanded the grooves out of the shoes however the inside of he clutch housing also has matching grooves worked into it.

 

I'd run it.