Well finally the brakes are working ok hopefully.

 Now I found on the passenger seat the floor metal is split where the rear outer seat bolt goes through it. The little L bracket that was welded to the bottom is broken too. Whats the best way to fix this, a piece of strong steal under the seat,under the car etc?

 Thats what I was thinking too. I have a piece of 18 ga steal I could cut into two long 3 inch wide strips. I set it in and it doesnt look like it would need to be bent unless it goes further up where the floor curves up toward the front of the seat. I was thinking about the jb weld and screws too, doubling the strips over to make it even more rigid. I had treated the floor metal with vactan and now its a black color so I dont know how the jb weld would hold to that, but it should keep the strips together.
 
  When I lft up on  the seat is when I see the movement and the crack in the floor more. So I was thinking it should be reinforced underneath too somehow. I dont know how I could get the old L bracket of without tearing anything up and its not likely to be able to be welded back together. But who knows I never welded. Maybe theres something under there I can bolt a heavy piece to or just jb weld it underneath since it wont be trying to be puled away from underneath anyway.

 Do you think I should wait and get some 16 ga or 14 ga metal?