A T5 might be a little light in a 3/4 ton working truck. You should have a torque tube to a carrier bearing, and a open driveline to the rear axle.
Your swap is fairly simple.
1. Remove old transmission , torque tube, and carrier bearing, and clutch assembly.
2. Install new clutch assembly
3. Install T5
4. Have a local competant shop make you a 1 piece open driveline
5. Enjoy your new OD transmission.
OK, I over simplified the process. Most of the information you read about the swap for 1/2 tons will also be useful for 3/4 tons.
T5 transmissions came in many vehicles. Make sure yours is a gm version. Also make sure you have a tail shifting unit common to the s10 pickups.
John
