69 firebird tank into 68

[68BadBird]

Alright so as the story goes, I made a stupid mistake, and bought a 69 gas tank forgetting that they changed the filler neck position. Is there anyone that has done this. What fab work went into it? Im working on my fabrication skills, have basic tools, a mig welder and willing to learn more. Im new to fab work but i have done some, i made he tubs for my car... but this has put me at a stand still. The only thing I can think of doing is cutting the hole where the license plate mounts to make the room for the filler neck. I also thought of putting blocks between gas tank and body to make it sit lower and get the filler neck through the hole, but Shes lowered about 2 inches from stock and idt that's the best option... I already bent the filler neck down and re soldered it, but didn't get the clearance... Any help would be greatly appreciated. Will post pictures if needed