Sam Lucas
Newbie
I have a 96 k3500 it has a 5.7 vortec backed with a 4l80 transmission I wanna pull the 5.7 out and swap in a 7.4 out of a 96+ what is needed to complete this from what I've read I either need a 454 pcm or have mine tuned for the 454 but is there anything else
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