We convert them to In-ground cylinders all the time. Not a big deal. Everything removes from the car and rails pretty well. We add a couple of braces above where platten plate (cylinder attachment plate) is , like they already have above the strike plates for the buffer springs. We cut the floor plate as wide as the block out that is needed to be cut for the well driller. Depending on jack sizes, we have to change out the pump occasionally to keep the speeds in line with original specs. Not cheap though with the demo, concrete saw cutting, inside drill rig for the new hole, getting ride of spoil, the cylinder, the pump and labor we are always well over $100K.
