Air dog df165 help

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Ok I ran across a deal guy bought one for an 04 and never took it out of the box and need the cash now. I can get it for $450 but it is for a 98 to 04 and I have a 06 what am I going to need to make it work and will it be worth while for it. I am in need of a pump I drain the rail with the TST above 4 and just can not seem to pony up the 500 for one but this is the AIR DOGG 2 and should be 600 so it is a good deal (comes with original recipt and registration card). I now that I would need the draw straw but what else am I looking at having to get. I am guessing wireing will be the big one. Any imput would be great.

Thanks.