I want to install formula taillights on my 86 T/A but I noticed the hrnesses are different due to number sockets and wires. I really need help with this and have not found any info on it, only T/A lights to a firebird but thats opposite, thanks

 

Like I mentioned in the PM reply, you'll need to perform a wire change under the dash (on the steering column).
You'll need to find the blue wire going from the brake switch to the turn signal connector (where it might turn white). Cut that wire. Then take the light blue from the brake switch and extend it all the way to the tail lights. That's your brake signal to the brake lights.

That should be all, not much to change.

Hope this helps.
Lou

P.S.: Btw, I just noticed the BBC in your name and also the VH avatar. Rock on!