Hello R. F.!
The spline count on the input shaft of the transmission you choose will dictate the kind of clutch you use. The diameter of your flywheel will dictate the diameter of the clutch you use.
Some on this site prefer to use the Camero-Firebird T-5 with the tail shaft shifter and some move that shifter to the top of the tranny by using an S-10 case. Others use the S-10 T-5 with the shifter already in the top of the case. The spline count on these two choices are different and until you decide which spline count is the choice for you, you will not know which clutch to use. Once you make that decision, you shop for a clutch with the correct spline count. I understand NAPA is a good place to shop. NAPA has a clutch to fit the S-10 T-5 in either a 9 7/8" diameter or smaller, depending on the diameter of your flywheel. None of this is difficult, you just have to go "shopping" with your numbers in hand.
Your choice of a rear axle should be made with width in mind and gear ratio in mind. Again, you have choices. Most common are the 3.38, 3.43, 3.50 on up to the 3.73, 3.78. But you could go lower or higher depending on how you would like your truck to perform. Again, this has been discussed her at length in the past and if this thread keeps going, no doubt you will get a lot of good information on why some think their combination of all these components is the best.
One thing I can assure you, it can be done and the results can be very rewarding!!
Joe
