if the taco is not a elocker equipped truck, than the answer is no, as in it isnt the same at all...

i think the 4runners used the v6 8"

if its the 8 inch  which can be confirmed by the axle code on the DOOR,   then YES  a elocker can be installed ,with some "modification"  of the housing
theres a 8.4 inch axle  in some tacoma's,  and its also in "some"  late model  runners      if  you are unlucky  enough to get one of these,  your just  screwed  they came mostly in NON TRD tacomas  and T100's

my neighbor has a 98 taco with A340F  and a 8 inch with 4.56  gears  from the factory  


just check the codes on the door