https://forum.ih8mud.com/threads/2fe-into-an-fj80-discussion.373166/page-2
Post 39 of this thread might shed some light on oil pump / pickup differences between 2F/62 3FE and 80 3FE.
http://www.cruiseroutfitters.com/engineparts.html
Scroll down and you'll see pans and gaskets for the 62 3FE.
I believe the pan differs on the 80 to suit the rear mounted tie rod setup. I know the difference has been discussed here..... IIRC, the oil pickup tube may have changed along with the...