ok, i have two 75 laguna el caminos, one is for parts and the other is for looks. the one for looks has the rectangel guages with dummy lights, but the one that im taking parts out of has the round sport gauges with no dummy lights.now for my question. if i take out the rectangel guage cluster all in one will the other guage cluster plug in there and work properly?!?!?!?!? please help me :?

...with a good wiring diagram. In our town the local library has factory manuals for GM cars.

With the book, you'll be able to tell if the wiring harness on your project car has the gage wires--just not used in your car. Or pull both gage clusters and look at the wiring connectors to see if the wiring is the same.

Of course you'll still need the sensors on the engine (you'll see them on your donor car). And the engine harness part of the gage circuit, if the gage wires are not in your engine wire harness.