64 C20 Fleestside with 3 Gas Tank??

[Eliasj123]

Hello,

I'm trying to figure out why my 64 C20 Fleetside has 3 gas tanks.. There's the one behind the seat and the other two are in between the bed and the outer panel on the passenger and driver side. There is a manual switch on the floor in between the driver side seat and the door.

Was this a factory option or after market??

I thinking about removing the one behind the seat and the one on the passenger side, then patching up the hole on the passenger side.. Any thoughts on this idea??

Thanks,
Elias