33gal aluminum tank on CL, questions

[slotard]

Someone put this up on my local CL:

33 Gal. Aluminum Fuel Tank For '73-'87 Chev/Gmc Pickup - $300 (napa county)

I have a 33 gal. aluminum fuel tank with sender, custom made from 1/4" 5051 aluminum. This is the same material that boat tanks are made from, which have a 1 hour fire rating. The tank has a compatible sender for the fuel guage and a baffle. The tank replaces the main tank on the passenger side.
Fits: 1973-1987 Chev and GMC long bed pickups. Could also fit Suburbans to 1991.

Price: $300 obo
Bill

It looks like an odd shape to me, but I would like a larger tank and aluminum is nice. I'm trying to figure out where the filler neck would go... thoughts on whether I could get this to fit?