@jonjebus: For the hydraulic control valves to come out of this 1967 International 2504 tractor, the hydraulic fluid supply and return lines will need to be removed from the bottom of the assembly. The supply line seems to be pretty stuck, so we'll have to make do with only removing the return line. After that, the four mounting bolts on the bottom need to be turned out and the hardware holding the control levers in place needs to be undone. Now we just need to figure out what to do about the stuck supply line.