You can go to the Early Ford V-8 club site. They have pictures of trucks there . The Front Clip changed from 40 to 41 but I don't know about the Cab differences, We have a 46 farm truck project out in a couple feet of snow. Ours came with a Y block Lincoln installed> I don't know if they have an Id tag on the firewall or somewher else. I think some vehicles had a tag in the glove box. If you sign up For the V 8 club, be aware that some of the guys get upset that you are not doing a restoration. Ask your questions carefully ! !