B body tank in A body

So I went ahead and got a B body tank to see if this sellers claim was true. It was a tight fit....too tight. I felt like I was just making a pinto out of my car it was up against the rear metal just in front of the bumper. It also was hitting the diff. The fill hole was too far forward although it could have been workable. Any way I bought a tank (not a cheap tank mind you... i committed with a efi Tanks inc one.....I need my head examined) and cut off the *** end and am in the process of welding it back together and using pontiac gto straps I had laying around to secure. BAM! Wish me luck.