driver seat

Get your local sheet metal shop to make a U shaped channel of out 16 gauge steel for the front part of the seat. Or get them to make two L shaped pieces that you can overlap to make the U. Then weld the nuts for the seat in place & and then weld the channel you made down to the floor pan.

I used the overlapped L shaped pieces and used aircraft structual blind rivets to fasten them to the old channel. I riveted a nutplate on to the new channel where one of the nuts broke out of the stock channel and pulled through the metal.