Marc. That is probably a very wise decision, you will probably find when you compare the frame under the 49 that it is similar to your 47 with a few exceptions that is if they are both 1/2 tons, if not then they aren't the same. The width of the frame at the centerline of the axles should be the same so a MII for the 48-49 should fit the 47. It did on my 46. If you want leafs on the rear, I bought a rear leaf kit from Chassis Engineering that bolted on using the rivit holes from the original spring mounts. Couldn't ask for a better fit. I used a 9" on mine also. Anyway Good luck. Check out fordbarn.com you might find some fenders near by.