I think that's why some previous owner welded 1/2" thick steel plate to the bottom of the radiator support that I got rid of. My '51 had pounded enough that the two outboard holes in the front crossmember had cracks that I had to weld and reinforce with some plate underneath. Not surprising though because the fenders were holding the cab up with the front cab supports rusted away. That 4x6 that someone stuck between the torque tube and the cab floor just wasn't doing the job of holding the cab up.
My replacement radiator support is buried about 4 layers deep in the parts pile, or I'd measure for you.
