Surely this must be a simple resolder somewhere on the PCB at worst..

Does anyone have any idea how I'd go about this? I have two tachos in the LS1 VN and only the big ass ugly one reads right The factory one still expects a 6cylinder signal but it's only getting 4 (LS1s send their feed in 4cyl mode, beats me why they did that).

Cheers,
Sam