since i've read that GM will use the 2011 boxed HD frame a little while longer i think about getting one and i really like to compare it to some other frames i owned or know about.
As far as i know the Dodge HD frame is around 190mm in height, 70 mm in witdh and the metal is 4mm thick.
Ford uses a similiar boxed part front but sadly remains using an open c in the rear, which is also 190mm in height and 70mm in withd but of course a lot thicker, around 7.6mm to my knowledge.
So how about the silverade HD frame? It looks pretty tough, got some nice slid crosmmembers, which seems to be welded more carefully trough both the inner and outer part of the boxed frame than the ram cross members, but how about the sheere frame height ans especially thickness??