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I have a 04 RCSB with 5.3L and Z71 package and was wonder what would be involved in swaping from auto to manual.I am leaning toward the NV4500 because it is stronger than the 3500 and granny first would work good pulling my race car.Could i use the 6 speed manuals the put in duramaxes the smf6 I believe is what it is? I already know how to install the pedel and all that stuff. I just need to know if I have to get my truck retuned after getting rid of the slushbox? Will the NV4500 work with the autotrac tansfercase?If not what tranfercase would I need? And is there any difference in the length of the NV4500 and 3500 or could I just use the drive shaft from the 3500 for it? Has anyone done this swap or just upgraded and have any tips. Thanks kody
 
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