Go manual with a flaming wallet extension or a longer borgeson style u-joint to make up for the 2 inches you lose when you put a smaller manual box in there. Easier than a manual column or go cheap and graft in a welded section of pipe with id to match the steering shaft. Weld it up good and maybe even pin it for added security. I hacksawed 3 inches off a yard doner, beveled the edges and welded the extension onto power shaft with help of some angle irons and vice grips. Kept it straight as an arrow when i was welding it up. Ground down the bead and it looks very smooth.