How would you make these seats fit on a 94 C2500?

[ridiqls]

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I found these seats that someone is selling at a local car show and there are pre orders. I believe they're either 54 or 56 inches and he has a few different colors but I never installed seats before. Anyone have any ideas how to install these on a 94 C2500? I can't tell but it looks like it doesn't need risers cause it's already lifted and seems to have sliding brackets installed? I dont know I probably dont even know what i'm talking about but if you have any suggestions I'm all ears. $150 -$350 for the entire bench isn't bad

 

[ridiqls]

I'm thinking about doing this but I do not know if it's this simple.. http://www.ehow.com/how_5727564_install-bucket-seats-chevy-truck.html

especially due to the middle seat and how the floor raises up a little bit from what I remember. Or I can remove that 3rd seat and go with driver/passenger buckets and install a custom center console.