"I chose this tank for a Onan diesel generator for my race car trailer. I mounted on the trailer tongue inside of the Tool Truck Chest. It fits perfectly inside. Actually, there is about 6 inches of room to the side if you mount the tank on one end. This leaves you room inside the chest to put a bottle jack and other hitch accessories.
I bought the fuel tank that had the fuel level sending unit. It takes a marine gauge that reads from approximately 240-33 ohms. I bought a Auto Meter 4416 2 5/8" gauge that has those specs and it is extremely accurate on the fuel level.
There are two lines on the tank, on feed line and one return line. They both are next to each other and I don't think it makes any difference which one you choose for the feed or return.
Great quality welds and mounting brackets."
What is your level of technical expertise? Home Handyman