[gonebad2]

Jegs sells a real nice filler neck extension piece for your tank ( I think a company called Jaz makes it). They come in two different lengths. Get the short straight one. You can use a hole saw to cut the hole in the bed wood. I have done this before. The filler neck and cap are almost level with the bed floor. As far as the center brace. I cut it in half then cut it down (subtracting the OD of the 4" pipe) so a piece of 4" steel pipe in the middle of it so the filler neck passes through it. then weld it back together. Just make sure you cut the crossmember it so it is the same overall length as when you started. Cut the piece of four inch pipe the same height as the rail. I have used this method several times and it works great.