I'm attempting to rebuild the steering box on my 1955 Farmall 100 as I have 1/4 turn of steering play. I'm confused by the shop manual instructions. It says to remove weight from the wheels and place wood wedges between axle and steering gear housing base. Since I need to remove the upper gear housing from the engine, what good are wedges since the engine is supported by the gear housing? And since I need to remove the gear housing base, would I not need to lift the engine at the clutch housing? How do I stabilize the engine if I do that? Shop manual instructions attached.