I put sidemarks on my 95 coupe. Spliced the wire on the back of the bulb housing to work as a blinker and not a running light. Should be a black, red, and green wire off the back.
Red- Running light
Green- Blinker
Black- Ground
Cut the red to eliminate the running light, but i would not suggest it. You will get poped by the 5-0 on someting like this.