IIRC, they were either 1/4" or 5/16". Might even be 3/8".

My original radiator support had some pieces of 1/2" thick steel welded along the bottom and inside the channel to just around the lower corners (pic). I believe it was the earlier style that didn't have the cross bracing rods. The extra steel that a PO welded on attests to the need for the cross-bracing. I picked up a better radiator support from Jim Carter's bone pile.
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Radiator Support Reinforcement

Last edited by klhansen; 06/23/2026 4:05 PM.

Kevin
1951 Chevy 3100 work truck
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1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car)
Busting rust since the mid-60's
If you're smart enough to take it apart, you darn well better be smart enough to put it back together.