Would search the section for pictures of a 60 of the 40/60 used facing forward in the back. That was a seating option in the FJ25. Believe Toyota's museum in California and the Miller museum in Utah but have an FJ25 with that style. Thirty years ago I bought a 71 FJ40 that had the 60% seat from an FJ25 in the back. I know it was from the front of a FJ25 because the front legs were even.
Over forty years ago I had an early Bronco seat bolted in the back of my of my 68. I used a piece of angle iron bolted to side frame rail to anchor seat belts for the kids car seats.
Believe 2003 three was the first year the anchor for the Latch system for car seats was required. I had small grandkids at time. Our 04 4Runner had the anchor point but our 2000 100 series didn't. In the mid 1990s bought the front seats out of a 1988 Mitsubishi Montero. Driver's is a suspension seat. I went back and picked up the fold and tumble rear seat. Back seat fit between the wheel wells like a glove.
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Project never go around to. If I do get around to it I would do some checking as far as raising the seat for more drop but the legs and still maintaining headroom. What I didn't like about the Bronco seat which is the same as the Toyota front seat would have is it fixed and doesn't allow room for storage in the back. Few years after putting the Bronco seat in I removed it. Used the 40 for hunting and needed space for camping gear. In the summer time we had a Ford club wagon van with a 460.V8 and just towed the 40 or a smaller trailer when taking the kids camping.