what to buy?

I need the bolts that hold the rear top part of the rear seat in, any idea what size??

Im wanting comfortable black seats to bolt in, what should I go with there?

What are the seals at the bottom of the 1/4 window that connect to the body called? I need to order those and dont know what to look for.

My car just has front lap belts, what is an upgrade I should do for seat belts throughout the car???

Thanks, and links are appreciated.

also:

8" rear shock plates

spare tire

and whats a way to get the lil springs for the door hinges in while the door is on? i couldnt get it with pliers, any ideas?

the tar paper stuff found behind door panels, and the thicker tar paper stuff found underneath and behind the back seat, need this stuff or something that works