Well i was going to get dynatech (oscar) to graft my exisiting harness to my ls1 when i get it, but oscar does not have quite the reputation he used to. Now i can solder, and i can read diagrams and manuals (can get any diagram i need i have a friend at gm), and i can splice. is this basically all there is to it? splice wires and solder connections? or should i go with a painless wiring box? how much do they run? i would like to do it myself if its not mission impossible and i wouldnt mind saving the money either just wondering.