Their web site has a user friendly "Build Your Belt" interface. I went with the chrome lift lever type just because I liked the classic look.
(Click the following pictures to enlarge)
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All the mounting hardware supplied with the belts is 7/16. This is correct for everything except the shoulder point. The shoulder point on my truck was pre-threaded for 3/8 NC. This was not a problem, I just went to my local hardware store and bought a 3/8, grade 8 bolt (and flat washer) equal in length to the 7/16 that was supplied. (Again, this was necessary only for the shoulder bolts)
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I bought one of the "Installation Hardware Kit #1" from Seatbelt Pros, really all I ended up using from the kit was the "L" brackets, but I was glad I got the kit because I needed those brackets to make this work.
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This project took me about 2 hours, and that included running to the hardware store. I also installed center seatbelts but they are tucked behind the seat in the pictures.
I was really happy with the quality of these belts. They were relatively inexpensive and are comfortable to wear.
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If anyone has any questions about this install, feel free to PM me or just post to this thread and I will answer your questions as best I can.