Astro Guage swap?

My '86 Astro has idiot lights. I'm getting ready to acquire an '89. It has guages. Would it be possible to swap the idiots for the guages with out completely rewiring the dash. I figure the sensors would naturally have to be swapped. But otherwise would I be opening a bucket of worms? I hate idiot lights as much as power windows, automatic transmissions and computers on my vehicle.