Cars will turn just fine spooled in the rear BUT!!!!
They will over-steer badly in the wet. It will also
wear your CV joints a little more.
You will need to have a fairly neutral rear toe, and a little more front
to make it turn in .....
It also helps to add a little rear camber to reduce inside wheel traction.
Both the race rentals I take care of with rear wheel drive
have the rear locked/spooled. One is a S13/1985 200SX which has
almost identical suspension to the TI...
Its not quite the same as locking the rear of a Jeep,
(I have one with air locking diffs.) Because of the
lower leverage on the axles due to the little bitty
tires (Relative to the 35" ones on my jeep.
)
Best option is to tig the spider gears together but NOT the carrier.
That way if you change your mind you can just replace the spiders.
(Which can be stolen out of another diff cheaply....
Also you need to get used to always moving forward then
turning at low speeds so the wheel in the rear can scrub.
Turn exit speeds go up because the inside wheel is not going to spin.
Watch your throttle control at the apex or youll drift out and loop it...
Dave