Still need help with Blazer rear seat.

[romarti0825]

As I'm putting my Blazer back together, I can't figure out how the rear seat bolts to the bed. The previous owner had mickey moused the old seat that use to be in the Blazer and tack welded the housings for the bolts. I bought the proper brackets for the seat that I have for it. The questions I have are as follows:

1) The Blazer I own is a 1970. I'm pretty sure the seat I have for it came out of a 71 or a 72. Was there a difference in the seat from 70, 71 or 72? Are they interchangeable?

2) Does any body have a picture of the bed floor of a 70 Blazer as to where the holes should be?

3) What size bolt do I need to use to bolt the seat to the floor?

Any help is appreciated. Thanks.