Finally got out to measure the spring/axle distances. From the front spring shackle to the center of the axle is 27", from the rear it's 25" so reversing it would only bring it closer to the front of the rear fender. Like I said, I don't know what year (or for that matter make) the rear end is but I know the fenders are wrong. As I said in some posts in other sections I'm going to get it in the garage take all the body off and decide what to do. I'm leaning toward a 283/327 swap with a Mustang II front and some 4 link rear. Maybe a T5 and some rear end with a 3.73 or lower final drive. I've read here somewhere that Nova or Camaro rear ends will work with the '40 frame.
Joe