On the Mopar 230 flathead six engines, the cam drives the oil pump, and the oil pump drives the distributor. Because of this, the oil pump can't be spun to pre-oil the bearings before startup. You can, however, pump oil into the oil galley through the pipe plug at the front drivers side of the block with a pressure tank.
Does your car have a fluid drive transmission? If so, there may be some compatability issues if the replacement engine did not have the same fluid drive transmission. I don't know much about the specifics of the fluid drive, but it's my understanding that they share oil from the engine somehow...
Pete
