Rick,
If at all possible, I HIGHLY suggest you do a nose pivot style tilting furnace and set it up hydraulically, as far close up to the nose as possible. It's more expensive but you will thank me if you ever start pouring things without a launder.
My big furnace I built with a center pivot, then I cut those out, welded on some 1" plate up front to the frame of the furnace and plasma cut and reamed/broached the 2" holes so that the 2" round stock that fit in the double pillow bearings couldn't come out. Heavy as hell to lift on the back end, but there is a lot more fine control!