For a permanent delete i'd just hook the two lines together with a T and put a breather/filter on as described in another thread (Dave?)
I've just put a cloth at the ends of the lines (while i had the communtator in the P/S motor replaced).
Initially i found it quite a nuisance without P/S but sort of got used to it after a week. Somehow i think the caster would have to be changed to make it pleasant for everyday use? The toe is already close to 0 and camber is to standard spec. on my Spyder.
Perhaps you'll prefer it without P/S - hope you'll post your findings.