I have an 89 Firebird Formula. I got a set of 85-90 style grid style taillights from a trans am. I am gonna put these on my formula to replace my other taillights. My formula wiring harness has 6 wires, and the trans am taillight only has 4 holes in it for wires. The 2 extra wires on the formula seem to be the blinker bulbs. Also the holes on the trans am taillight seem to be too large for the bulb to fit in good. Has anybody done what i am doing? If anybody can help i would definitely appreciate it! Thank you so much!