[67ChevyRedneck]

My blazer tank's sending unit was less than an inch away (maybe closer?) to the bottom of the bedwood. I think trying to raise the tank (especially 2+ inches) isn't going to work.

Also, hanging it by the flange probably isn't a good idea. The flange on these tanks isn't very strong and wasn't meant to support the weight of a tank loaded with fuel. Chances are it would crack after a short period of time (especically a tank made with todays cheap, thin materials.)