Nice! Usually fuel tanks are either galvanized or aluminized to prevent rust but you can paint it if you want to, although it's unnecessary. No "air inlet", use a vented gas cap. The 1/4" NPT threaded hole is presumably where your fuel line connects.

 

 

 

Wait! That threaded hole seems too far up, and up against one of the support brackets. Is there another threaded hole on the bottom or sides near the bottom?

 

This is the same position as the fuel line on my F350, There is just enough room to fit the fittings between the tank and frame rail.

 

I am looking at parts for my gas tank and I see fittings for rollover vents, what are these? Do we need them?

 

 

Look inside the tank first to determine if there is a standpipe (pickup tube) attached to the upper hole extending to about one inch from the bottom. If there is not, then it is meant for venting or fuel return purposes. The "drain hole" in the bottom of the tank is most likely used for fuel suction then, and it should be set in a raised indentation in the tank. If there is no raised indentation, then I would make a standpipe about one inch long and incorporate it into a 90 degree street elbow and valve

 

As you might suspect, it is just as the name implies.

https://www.onallcylinders.com/2015/...er-vent-valve/

 

 

That's purty. I would use the rubber side of the hose against the tank. Having been a marine first responder for years I'm familiar with the many uses of out of date fire hose. Makes great chafing gear.

 

Yes. That is the plan. It is great stuff. It has many uses. Being that I am the guy that does thousands of feet of hose testing each year, I have quite a bit of the stuff. It is a double jacketed hose. I took the outer cloth jacket off. The inner rubber jacket works great. I have used it on all my tractors I have refurbed.. Basically anywhere metal touches metal. It makes a great grippy base on the truck bed extender. I also used it as a hinge in my 4 2'x4' windows in my tree stand. It does not make any noise when opening to take the big shot.