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If you buy your head unit from Crutchfield they will supply you with the correct adapter for your dashboard + DIN size and also with a direct fit plug for the speaker/power connector on your harness. You just have to connect the loose wires on the end of the harness plug to the correct wires on your head unit. But everything is color coded IIRC and is easy to get wired.
You can get a lot more bang for your buck today. Checkout the JVC Arsenal models with Bluetooth, 2 USB & 1 aux inputs, remote control, android remote control app and 3 sets of preamp outputs.
I bought my JVC head unit from Crutchfield. I didn't like and ultimately did not use their DIN adapter because the plastic was too flimsy for my taste. Their speaker and power wiring adapters were good and include intelligent instructions so I would second this for that reason.
I found their installation kit to be of a high standard all the way around and am quite satisfied with it. To each his own.