32 Ford bumpers more work on a 31 Chevy. The bumper brackets bolt into a reciever on the spring mount. I would say the 32 Chevy Bumpers as they are one piece, and look better than the 31s. Although the rear bumperetts are 31 Fordish and look neat. I know they make 32 Chevy bumperettes as well. The other thing to consider on a 31 Chevy with no bumpers is covering the hole where the bumpers bolt into. Not very ***y. Some fender cars look right with bumpers.
Full fenders look great, don't loose them. Maybe nerf bars if you don't like the bumpers? couple bolts and you would be able to switch back to the stock one's if you wanted. 31 was a weird year, I believe they offered early split bumpers, and the late cars had soild bumpers? There were a couple mid year changed on 31's.