2000 LS Monte Carlo
#11
WELCOME. yeah your trany would need changed. new harness and PCM for it. would be best if your going thru all that work to go to the Supercharged 3800 the L67. if you get an 04 SS i believe they are SC stock. the SS also has better suspension and more options. so getting an SS would be an easier route if your ok with that.
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