Replaced Gas tank today

[cjlinkster]

I replaced my driver's side gas tank today in my 1984 C20.

I installed the tank from the underside of the truck. Everything was going great until I got to the point of reattaching the fuel lines and electrical wires (for the fuel sender). The red wire would not snap on the fuel sender. I had the 20 gallon tank laying across my chest, and it was a bear to attach the fuel lines. I will be revisiting all of this when I pull the bed later this summer for body work.

Next time, I will be pulling the bed. I wrestled with installing the new tank for at least 2 hours (4 hours total including removing the old and cleaning the mounts).

While I was under there, I notice that about 3" section of my frame has a slight bend (flares downward about 1/4" to 1/2") just on the lower lip of the c-channel. The top section appears fine. I have attached a pic of an example of where the bend is located.

Is this something that I could just hammer back into place? Are our frames heat treated?