Do I need a wire harness when installing my new deck (stock is in now)?

Do I need a wire harness when installing my new deck (stock is in now)? Thanks in advance.

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93 Z28 M6
116K, MAC Headers, Y-Pipe, Off-Road Pipe, K&N FIPK, Dynomax Ultra Flow Welded Muffler,
TB Bypass, Taylor Wires, Bosch Platinum Plugs, Homemade Air Scoop, K&N Oil Breather,
!Silencer, !EGR, !AIR

My 1993 Z28 Webpage (http://cobraeatr.homestead.com/z28.html)

Count on it, you will need one that matches up to your deck and one that goes from the stock connection to the new harness

Ditto. This wiring harness will fit your car:

http://www.sounddomain.com/sku/SCOGM02B

Thanks for the info fellas. It's much appreciated.