Originally Posted by Hot Rod John
I have yet to see a "rear fill" rear frame mounted fuel tank that doesn't hang down like a ruptured duck. If ya think about it, the license plate is low, and if the filler neck is there the entire tank will need to hang below that point for it to fill correctly.

Here's an example:

http://i645.photobucket.com/albums/...20Truck%20Stuff/IMG_0912_zps13cee1d2.jpg

I installed a Chevy 49-52 passenger car tank in my '65 C10. It was one of the first things I did to my truck back in January of 2009:
http://i645.photobucket.com/albums/...Status%20Photos/GEDC1242_zpsba37b321.jpg

Here's the "How To" thread I created. It discussed where to get parts, etc.: http://talk.classicparts.com/showthread.php?p=88322#post88322/

More tank options here:
http://67-72chevytrucks.com/vboard/showthread.php?t=522264

I agree that most of the rear-fill tanks don't look right. Regardless of the tank used, a lot of the tanks mounted in the rear are hideous because they're out there for the world to see. The way a lot of guys mount them also makes the tank the first thing to the crash if, god forbid, you were ever rear-ended. I guess some guys just don't think about that though.

Your install looks good. Nice truck!

1946 GMC Pickup - S-10 Frame, 455 Buick, TH400, original patina.

My 46 GMC on Photobucket