I would've bought a tank like that for my car but I couldn't find anyone who made one. I have a '65 Coronet and I did not have any luck finding a tank with a built in recess. Ideally I'd like to have a tank with the built in recess for the pump and have the tank be about 1 inch deeper. I think there is room in the early B body cars for a slightly deeper tank.

I might end up having a custom tank built for my car since I'd like it a bit deeper than stock but a little narrower so the 3 inch exhaust will clear. My leaf springs are moved under the frame so everything is a little tight back there. I can probably get someone to weld up a stainless tank for me if I draw up a blueprint.