Goin to pickup a stepside bed tomorrow, gotta few questions

[CT-Truckster]

well I landed this stepside bed on ebay, http://cgi.ebay.com/ebaymotors/ws/eB...tem=7976136808 which seems like a pretty good deal to me. goin to get it tomorrow, about 3 1/2 hours away. my question is about the gas tank. My 84 is on the drivers side and this one is for pass. side tank. I read in previous posts that driverside fender with gas aren't available but that my driver side tank and straps would work on the pass. side of the truck? If correct then I'm assuming to move my tank to pass. side I will need a filler neck specifically for the stepside and redo or get new fuel lines and wire to the gas gauge and thats it? seems like a pretty straight forward swap if I'm thinking right, If not somebody straighten me out.