T5 Borg Warner into an A body???
T5 have been known to stand up behind some pretty stout power. Remember the torque ratings are factory for a production car for 100K miles. It isn't a one-time peak torque rating.
If you were going to run a t5 in a heavy car with lots of torque or a a light vehicle with excellent traction I would be very wary.
Putting a good shifter (with positive stops) on the t5 will often be the best investment in longevity.
Again fitment will be the biggest challenge, especially on a budget.