Yes it will fit with many modifications.
no 84 and 85 swap out.
The 1984 Toyota pickup truck headlight relay switch can be found in the fuse box. The headlight relay switch will be at the top of the third column.
A 1984 Toyota pickup will not go into gear if the transmission fluid is low or the linkage is not adjusted. The fluid must be checked with the engine idle and at operating temperature.
7 QTS. with filter
Should be (0.031) for the engine you listed.
wiring diagram can be found in a haines or chilton 1984 ford pickup shop manuel.these books cost about 15 bucks to buy