I suggest purchasing a ford shock tower from a F-series turck from the 80's
You can get them from the dealership for like $15 per side, The Ford part number I give is E5TZ-18183-A, they were factory bolt on in the ford application, but you can and should weld them on. They are pretty tall so you might have to cut them down a little, but for $15 per side, if you do screw up, your not out a huge amount of cash.