Been watching this thread for an answer to this: "bottom
reinforcing bracket for a AD 3/4 ton side tire carrier?"
But taint seen anything solid. I'm unaware of any thing other
than the two side angles and the main carrier bracket that are
pictured here:
http://www.pbase.com/dennygraham/image/140595481/large

By the way, this is off a '53, 3/4 ton GMC but I'm sure it
would be the same as the 3600 Chevrolet.
Tim, I think the two different pairs of bracket rails listed in
the parts book would be for the light duty truck tire and the
larger 3/4 or 1 ton.

Denny Graham
Sandwich, IL

Denny G
Sandwich, IL