Wiring nightmare 69 camaro with lt1 now going to ls2

[fillpot]

Here's the problem guy's,my 69 camaro has the tilt column motor and trans out of a 95 trans am,now I'm swapping in a ls2 trailblazer motor and trans,the main problem is the under dash wiring I don't no what the hell I've got under there,looks like the main harness has been hacked into with the lt1 wiring harness,everything seemed to work decent but i'm not sure about it.I would like to start over and redue it all using the same column but with just a new harness anyone with any idea on this.THANKS!