Shift kit with stall?
#6
Pontiacerator
iTrader: (12)
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A built transmission from one of our sponsors would be your best bet for performance and reliability. You can probably find a local builder who will do it for less cost, but you MUST use someone who specializes in hi-performance builds of the 4L60e. Other than those two options, you'd be better off just leaving it alone and having some electronic tuning done on it.