Guess who's back

[Jesus5150]

Hey boys. I haven't been on here since I sold my longhorn in 2015ish but today I picked up a new project. She's ROUGH but I got her for $100. I present to you "Tater". Now I have a 400sbc for it, but I also have a 2004 escalade that runs like a dream and am toying with the notion of doing a body swap onto the AWD 6.0 chassis. But in the mean time, I have to deal with this floor. I'll attach pics. The rockers are gone of course but what concerns me is the structural brace underneath the floor is rotten. What's this square tubing called? When I patch the floor and replace the rockers it'll have to be done.

Anyway feel free to post your opinions on the ol girl. She's rough but in good hands.