Fuel Tank Swap

[danielwkade]

I'm not finding some specific information I need on fuel tanks. Right now I have a '72 K10 with an in-cab tank and an aux reserve tank. The reserve tank is very small and made of plastic. The aux fill tube is mounted behind a small metal door mounted under the belt line behind the driver door.

I want to swap to a larger capacity saddle tank to be used as my primary tank. I hope to make use of the fuel door that is already there for the reserve tank. I really don't want to do any cutting, the paint is original.

So my specific questions -

1. Will a saddle tank fit the 4wd with leaf springs?

2. Is it possible to hook up the saddle tank to the existing filler mounted below the belt line?

Thanks.