1941 Ford 2dr Gas Tank Selection?

I have a 1941 Ford 2dr on an S10 Ch***is. What gas tank will fit using the stock tank and filler location?

 

I temporarily mounted a tank from a Geo Metro and the filler lines up perfectly. Only problem it's only 10 gallons.

 

Thanks. I'm running a sbc and a th 350. If you have any other tips on how you set up your 41 up I'm all ears. Do you have the Blazer rear in yours? I have the stock S10 2wd rear and I have to use 1" spacers to make my rims fit. I'm thinking of using BORA Spacers they are hubcentric.