Ive had the msd fuel injection on my truck for about 5 years. 1985 short box chevy. no problems till yesterday, I pull 350 out and dropped 383 in. We were putting everything back got engine ready to start no fire. We checked it out and the 6 a box had melted the copper strip in the box.We then hooked it up without the box and the engine fired up with no problems. My question is do i need the box because all my computer numbers were working. I have another question is there someone in the phx AZ. area that anyone can recommend a good shop that is good with the msd fuel injection system. THanks Otis