eh? st185's already have a 3s-gte in them
unless you mean your taking a 3s-gte out of a st185 and putting it into your st182 (or was it st184??).
I wouldn't use your stock gearbox it would probably break after a week or so. I've heard of people using sw20 mr2 lsd gearboxes and using the halfshafts from their celica to make it fit(?)