Bennett - You rock. The pics help alot. Actually, your set up is almost identical to the one on the 1980 40 in my profile pic....down to the bent C channel! In your opinion, could you drop the C channel down some more so the side didn't have to be cut out (and therefore stronger) or would that put the channel too low to the ground? I'm gonna add a mini-truck power steering setup, so I won't have to deal with the Sag box issue.
Looking at your bottom pic of the C channel - did you break one of the ears off or is the channel offset to one side? I see you drilled a hole in the channel to let oil out, too.....smart....