The Stovebolt Site Forums The Parking Lot '60-'66 Trucks How can I find out gas tank size?

I bought a 75 Blazer gas tank that one day will be installed under the bed of my 64 C10.

What I don't know is how to tell what size in gallons the tank is so I can but the correct sending unit for it?

Is there a number somewher on the tank or how do you find this information?

thanks once again,

Scott