Torsion bar numbers???

895 would be the match to the 894. But I would carefully measure the diameter of both with a caliper first to see if they are both .89". And see if the 716 has markings on the other end. /6 bars would be 888 and 889 from the factory. See here:
ftp://rohan.sdsu.edu/pub/mml/archive/Suspension&Tires/t-bar-application.txt

The /6's are the 'ideal' for drag racing as they store up more energy at ride height that can be released to push the front end up at launch. But for street driving, it'll be pretty poor IMO, tending to yaw over pretty badly. And raising the adjusters won't 'stiffen' it up at all; it will just raise the ride height with the same stiffness.

How large to go depends on your roads and how you drive it and how flat you want it and to some degree your rear spring rates. For rough road use with a lot of undulations, or a softer ride, I would stay with the .89's and invest in shocks. For smooth roads and a flat race car like feel, go larger. (You'll get a variety of views on this.)