Loosen up the bed bolts and take out the ones on the drivers side, leave the passenger side ones in but loose

Now take a piece of 2x4 or pipe whatever you have laying around thats long enough and prop the drivers side of the bed up, will give plenty of room and you dont need a couple more hands.
This will take no more than 15 minutes with a decent impact

Agreed fuel line disconnect should be 3/8's in most metal kits that are color coded its the gold one.

 

Good info by read head hunter on leaving passenger side bolts in and only loose that should also eliminate having to align the bed bolting it back.I'm gonna try that when I replace my rusted fuel line assembly.Thanks for the TIP.