Adjustable shocks?

I need to get a new set of rear shocks for my '73 satellite. currently it has adjustable ones on there. And They are needed so that my rear tires clear the rear fenders..

What are some good adjustable shocks that I could replace these with?

I believe they are KYB's on there right now too..

and whats the "best design" of adjustable shocks? thanks for any and all help, suggestions, and comments...