Being a 4 cylinder you might want to wait. Though, if you only stay with 33s the 4.88s will not be bad at all. Just to compare, my 83 with no power runs 4.88s and 33s without much issue. It feels about like it should driving on the highway and in town.
If you do pass, could you put me in contact with that deal? My 96 could use new gears.
83 Hilux SR5