Thanks for the offer. I ordered some aluminum blanks to cut myself, not quite as big as yours. I like the idea of spanning to the bed support beam though, so will do that. I agree that the little FWC plates seem too small. What's your thinking on the 3 holes? Wasn't sure what the other 2 were for.All I have done is enlarged the plates beyond what FWC offers for folks with a superduty, what I have done is far more robust imho. Also ya gotta keep in mind this will be for a HIGHLY modified 1982 FWC.
I had a mail order service make them up (these ones were xometry with a coupon code, otherwise send cut send tends to be cheaper). If you want a copy of the files I can send them to you.