3 quick problems

Well that is good to know. I will check for nuts on my 70 and get the correct bolts. Are they accessible without removing the bottom seat?

Nope.:D
Push the seat bottom toward the rear of the car kinda hard and lift up on the front and it should come out.
Down where the seat back is close to the floor there should be two 7/16 bolts (one on each side.
Then lift the back and it should come off.
It helps a LOT to take any window cranks and armrests off one side.