I recently changed out my front fenders and installed a new radiator support on my 71 Chevy Malibu. I reinstalled everything the way it was and it "looks" like everything is wired up correctly. However, now when I install the battery by attaching the Pos cable first then only "touch" the Neg cable to the post, I get a spark light show. Bigger than the normal small spark when you first attach a batt cable. I have installed new battery cables and have checked and rechecked my wiring. The pos cable going to the starter is not grounded out on anything either. Can a bad starter cause something like this? Before installing the nwe motor, the old motor would turn over fine so I don't think it is the Voltage regulator or horn relay. Oh, I also put in a new alternator. It was a factory duplicate of what was on it originally, just like the one that came off it. Where should I begin to look and what should I look for? Thanks!