If you look under your BJ74 from below you will probably be able to find the spots on the floor
where the holes for the suspension base come through. I think my truck had 3 out 4 of welded
nuts on one side and only 2 on the other side. Either way usual Toyota had it laid out for either
seat variation. Make sure you spray some paint over the nuts below so water and rust don’t make
their way in.