That should not be a problem. I found through exp. that the top of a PVC cleaner can works great as a fuel neck and cap. Just solder in place. make sure you have some type of breather so your tank does not build up a vacuum as the fuel is pulled by gravity. I have seen people (myself for one) use check valves on top of their tanks as breather. Just a couple of ideas to help you along. Do your research and don't be afraid to ask questions, That's what we're here for.
BTW enjoy the ride and welcome to the addiction