I accidentally ran across this thread. A properly maintained T5 transmission can handle 250 hp and 300 foot pounds of torque. Don’t plan on those numbers if you simply pull an old one out of a used truck or Camaro and install it into your truck. Have the T5 inspected and make sure it’s ready for service. End-play of the main shaft and input shaft is a very important issue.
The ideal combination is 0.72 overdrive with a 3.73 or 3.90 rear differential. The 0.63 OD is rather tall but an engine with plenty of HP can handle it. The 0.86 OD gear will work well with a 3.08 rear axle. The difference between a non-world class and world-class transmission strength is minimal and should not influence your decision.
Almost all 1993 and earlier S10 T5 cases have a Muncie pattern. Feel free to contact me with your T5 questions.
Jay
