Here's what the seat frames looked liked after tear down. I doubt GM painted these back in the day judging by the amount of rust that came off of mine. I had to get new back rest springs, they had completely rusted and broke.
and after being sandblasted and powder coated, mocked up in the truck:
The passenger side seat brackets I just ordered from ECE (Early Classic Enterprises) They are direct bolt in.
Here's a good link for bolt hole locations:
http://67-72chevytrucks.com/vboard/s...d.php?t=516328
Restored pic after using the best parts from the 2 consoles I had.