I'd like to hear more about this. Anyone else done this? I'm probably like a lot of guys and got stiffeners welded on a long time ago and never thought ahead to install provisions (nuts welded inside them) for crossmembers and such.
I've got everything I need to install a 3 link middy (aside from time and energy) so I just need a flat belly crossmember. I've already even clocked my 231. I envision just building something out of 2x6 box that I've got laying around utilizing the stock 4 bolts underneath but also having it wrap up and over the sides. I'd probably also incorporate some plate welded to it that would protect the cat. It could wrap up around the sides as well and bolt into tapped holes if the 10 gauge stiffeners plus the stock rails themselves provide enough "meat" to grab into.