Use a hammer one or two sizes larger (BFH if necessary) to restore the bottom of the oil pan back where it belongs. It would also be a good idea to make sure that the sealing surface of the oil pan matches the bottom of the engine block to make sure you won't have any leaks. That will be difficult to do with the engine in the truck and even more difficult to pound on it to make it fit. A spare block would come in handy for this operation.
Carl


1952 5-window - return to "as built" condition | 1950 3100 with a 235 and a T-5 transmission