Loads of sierras with manual steering, so up to you, if you want to keep a nice quick ratio like the std 2.54 turns lock to lock as on the cossie it will be heavier of course but not unduly so, and then only at parking speeds, you could use the ps rack just without the ps, even cheaper, or if wanted fit a more normal 3.3 turns lock to lock of a non sporty sierra, at the other end there is a 2.2 turns lock to lock manual, as I built one up for roosie, but of course less leverage will be heavier.
It won't be a problem unless you're the man of the MR MUSCLE advert!!
tabetha