Let me first start with I did a couple searches and I'm sorry if i missed the appropriate already gone through post..I have the jtr v8 conversion kit in my 82 zx...I bought from a guy who had a 350 in it and I'm in the process of building a 92mm turbo 220cc aluminum headed 406 bowtie to put in..ok so what I have is a bunch of wires coming out of the firewall on the drivers side that I'm needing to find which are tach signal, switched key wire, and main power to interior or lights and accessories...im not looking forward to hooking up a wire going into car seeing if wire works labeling if it works, stop repeat . I know I'll be doing this with any advice I'll receive from you already but with any help could really shorten my length of time I can do this without having a friend dedicating too much time out of his day connecting wire wires..checking off multiple wires on if they are of use or not....I will take pictures if needed after work tomorrow so you guys have an idea of exactly what I'm working with...most of the harness is is intact coming from outside of firewall on drivers side.. Thanks guys I hope this wasn't too aggravating of a post.