Vintage Moon Aluminum 5 Gallon Dry Sump Oil Tank AN-16 In/out 2 x AN-12 Bungs & twist on chained correct Cap. Looks very clean inside can be disassembled to restore, if in the 70s and 80s you’re a Racecar ran a Drysump. This was most likely the tank. I may be able to come up with the Moon spec label!

Thanks for looking;

Craig