First can you switch a 2001 Gt gauge/instrument cluster into 2001 V6 Gauge/instrument

First can you switch a 2001 Gt gauge/instrument cluster into 2001 V6 Gauge/instrument cluter? Is so what do I have to do? Thanks for the help I need help becuase I will be going faster then the 120 on the stock V6 cluster. And it would look alot nicer.
 
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I figured you could as the gts I believe have the same 4r70w tran.s the only differnce is in the pcm/ecu that adjusts the votalge out from the trns to the gauge cluster, the only problem is getting the math right so it will read the correct speed, as their is a difference in the spacing i.e. 60-150mph, any advice? I have heard of changeing the gear ratios and tire size to adjusts for the difference even then some say it works some say it does not any suggecstions?