looking for picture of 71 fj40 seats & rollbar

[Degnol]

Answering in place of IDave...
SOR sells the brackets, but if you saw them, you'd kick yourself. I would fab yours. If you have a vise and a hacksaw, go for it. Otherwise, SOR.
GL
Ed

 

[chuglife]

Alright then. Do you think I should have a look at them and copy their design, or is it really that much of a "no brainer"?

 

[Degnol]

Chug, a simple "u" shaped piece of metal will work. One side of the "u" bolting to the tub and the other to the seatback, the bottom of the "u" being the distance necessary to clear the rollbar.
Fab away!
Ed

 

[IDave]

Ed is right. The only thing about going the bracket route is you have to move the rubber feet out toward the hinge, or they won't hit the wheel well. Then, when you do that, the seat makes a long lever and smashes the feet if someone bigger than 100 lbs sits on it. Then, the seat cants downward. I am thinking of just getting the later, smaller seats, myself, just to get things to ride nicer.

The driver's side front bracket:

 

[chuglife]

Ahhhh, I understand now I also like your idea of having the speaker in that void between the seat and the tub. Thanks Ed and IDave!