The S10 was usually geared for working, therefor a very low gear to move loads. What is the rear gear ratio? When you multiply the rear gear ratio by the T5 first gear ratio, 3.78, ideally you should get an answer between 9.5 and 11. Ideally around 10. I once made the mistake of installing a T5 with a 3.50 first gear into a car with a 3.4 rear gear. Couldn't go 10' before I had to shift and then the jump in ratios between gears was too wide. The T5 is not an inexpensive trans to overhaul. I have bought many that 'were running when removed' and found they didn't always want to go into the gear you were after or the teeth were chipped or the most common problem, the synchros were pooched. If you want long term reliability, buy a unit from a reliable builder and get the ratios that suit your vehicle. You probably want to use the S10 style for the shifter location. A good T5 tech will know how to put an S10 tail stock on a Camaro T5. You will need a conversion kit to mount it, so check if you could also use a Ford T5, far more plentiful and less expensive. Good luck on this one. The T5 is a great tranny, but full of surprises.
Warren