What I ment to say was that I had pulled both pans. I was planning on swapping them, but hadn't bought a pan gasket yet. I guess that's one more thing I need to go looking for. Nothing's ever easy!!! And I checked the casting number, it's a 360.
OK...that changes things. 318 and 360 pans dont swap, and you need a CAR pan AND pickup to use the 360 in a car....truck/motorhome/anything else won't work.