I don't know if I'm waisting my time or yours, with this post, but I've got some pictures of my frame connectors.
They're 2"x 3"x 3/16" full length, slip over rear frame member, full welded to the floor pan, not thru the floor pan,if anyone is interested. The only place they're not welded to the floor pan is small kick up for the rear floor pan under drivers seat.
They're on my '65 Coronet.
Max