Here's the K that's in my 71 E body. I made a couple gussets and rewelded pretty much all the welds after sand blasting before paint. Hope this helps a little. Actually, I sand blasted it clean, started welding and there was grease was coming out of the seams making it real hard to weld. So I steam pressure washed it again and it got kinda rusty.

Of course I added a skid plate while I was at it.