Seat cover won't fit that seat, it carries more foam for the pillion on it ;-)
My shock came ready to fit....Penske I would have thought should have something on record for the length of hose required if not a quick measure up would put you in the ball park, a few mm longer is wise. this is my routing but you may figure something different ?Penske 8983 rear shock is on order (not through GP suspensions... but the dealer in PA doing a group buy). Should have it towards the end of January! I'm going to stick with last year's fork rebuild for now.
For those of you who have done a new shock with a remote reservoir (MOT...), did you need a certain or longer length hose for mounting?