Hi there. I am looking for any information regarding the wiring of a vortec engine by using the stock wiring of a vortec motored vehicle. I wolud like to use it with the computer box in my 1973 Chev Deville. I know thre is painless wiring loom but its pricy. I thus need to hear from you guys if you have used the stock wiring and which wires to eliminate. I need a wiring diagram if possible so that I could make a loom from the stock loom. Thanking you in advance.