There's lot of weight in a stock steering column & jacket that can be removed; I think I posted a photo of my buddy's column on the weight-reduction thread, but that was back when I knew how to post photos here.
basically, a lighter shaft, cut windows in the jacket. I think his weighed something like 8-10 lbs after he was done (drag car, no turn signals).
Love the idea of aluminum door handles; I presume you've already done the hinges.