Rust Problems in the Trunk

Dont look to bad to me, but it does look like some tried to cut the Rust out with tin snips! Buy a pair of repo trunk floors and have someone patch them! You dont need to replace the whole trunk floors! Are the frame rails rusted!

i had to cut mine out....and they were sorta like yours.......i dont know i just figured if your gonna do it, then do it right dont half ass it...

This is one of the more common places for severe rusting on Mustangs. I am in the process of doing mine right now. Looks like your frame rails are well on the way out too. I just did the LH side this past weekend and plan to do the other side here soon. I am doing the partial frame rails and the trunk floors aswell. You can get full frame rails or the last couple of feet of it or so. Unless you just put a trunk floor patch on top it is a fairly involved process. Involves good measuring/cutting/alignment/welding/grinding and alignment skills. Have a look from the bottom side I'll bet it is worse from that view? This is the spot were all the road grime/salt/water & mud gets thrown and sticks. If you start I would go in with the idea that you will be changing your trunk floors and the partial frame rails and maybe more.

That seems like a fair approach. I remember getting a body man gave me a quote as a side job of $300.00(quite awhile ago) labor only. I spent about $200.00 on the parts(recent parts price). BTW mine looked and was alot worse than yours some body had patched mine over which made it even worse. I will see if I can post a picture of the piece cut out.