So Im picking up a hd trans next week and I figured I would build it to withstand anything and then leave it in the garage untill I do an engine build later on and I honestly have no Idea what I need and what I don't need but heres a basic list that I got, SO any tips or advice let me know

245mm Torque Converter
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Stall speed:3500
Option 1:no flexplate
Option 2:none selected $389.99 $389.99 Hardened 4th Clutch Shaft
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$69.99 $69.99 Gear ratio conversion kit
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Size:7/8 inch chain
Model:3.29 gears HD $399.99 $399.99 GM Transmission overhaul kit
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$149.99 $149.99 Steel Channel plate gaskets
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$34.99 $34.99