A-Body EFI Fuel Tank

There's these guys as well- aluminum, baffled, fully TIG welded bolt in tanks. Can be made for EFI pump in tank applications as well. Spendy though. But another option out there if you're not worried about stock looking. Or don't want stock looking.

http://www.hotrodcitygarage.com/tanks.html

http://themopardude.com/CUSTOM_GAS_TANKS.html