is an upper and lower fuel pump interchangable in a '82 150 hp

[fruitvilleslim]

so here's my question, 1982 150hp evinrude, i have the lower fuel pump, and thats all good. i bought the engine and it was missing the upper fuel pump. the lower one is 3 nipples, i ordered the upper fuel pump, 3 nipples also, (or so i believe). I should have gotten part 393868 to replace the upper pump, but i was sent 393870, they look identical to me in the diagram, so basicly my question is are the upper and lower pump the same, or do they have different internals and just look the same???
big thankyou to anyone that may be able to help, perferably an evinrude tech!!
i wanted to check before i return it and pay shipping

[boats.net]

No they are different. You should order 0438559.