I have a TCI TranScat Super II shift kit in the TH350 in my Burb. I installed it myself when I rebuilt the tranny. It has pretty firm shifts and will only bark the tires when I am heavy on the go-pedal. I like it and would recommend it. 
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--Ben
71 GMC Suburban 4X4
The "Beast"
388 CID Stroker, TH350, NP205, 8-lug D44, 14BFF w/ Detroit, 4.10:1 gears, 4-Wheel Disks 4" Lift, 35" MT/R's.
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