Junk yard find or not

[1964C10]

I have not been able to find a fuel tank for my truck that will go behind the rear wheel, the junk yards pull them or punch holes in them. I dont know if that is law here or something. Anyways, I visit the only u-pull-it yard here fairly frequently because they get alot of older trucks in. Well I did find anything today and was about ready to leave when I spotted this sitting in the crusher bin, it had an v6 motor banged into the side putting a small dent into it.




Anyways, I wanted to know if this is a find or a total bust. It measures 29"X21"X10.5" on the thickest part and it has 22 embossed in it so I suspect it is a 22 gallon tank. However I have no idea where it came from. It is a side fill tank which I want. The main question I have is, it will take quite a bit of cutting on the framerails to make it fit, will that be a problem strenght wise. The second thing I wonder about is the sending unit. I dont know much about fuel tanks could anyone chim in and let me know if this is chevy,ford,dodge etc. Any other advise or input would be greatly appreciated!!