Hi was wondering how to change from a 2 gauge dash to a 3 gauge dash, like how do i wire it up and stuff

the wiring plug is basically the same, just that there is 2 different 3-guage dashes,,, one you`ll need to add a wire,,, the other you need to add 2 wires (a loop)

edit-->for the taco

but still , for both you`ll still need the right , & in good nick, plastic-circuit-sheet for them & of course the right mounting bracket-ware

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No offence intended here but--> anyone writing a book about minis 30 years ago may not have experienced such worn or stuffed-with components as we are finding these days.

You should put your heart & soul into everything you do.