[rotorwrench]

A person can support the frame at the rear of the vehicle and disconnect the rear spring from the cross member then disconnect the brake rods & shocks so the drive train can be moved aft. It would make the recoupling of the U-joint spline a bit easier and allow the engine to be placed in the frame with less fit problems. There are likely other ways to deal with the problem but the model A drive train & suspension components move around a bit when separated from the engine and worn or some what tweeked parts can make the situation more difficult.