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Stick with stock stall speed. (I think around 1600-1800) Unless you have some performance upgrades, stock is all you need. Buy a GOOD one though, an 80 dollar t/c is NOT a 'good' one.
When I enter make/model into Autozone the "vehicle specific" results returned options with 24 to 31 splines and starting stall speeds ranging from 2400 to 3200.
I can count the splines, but not depth and stall speed.