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Ok guys, I could use a little help figuring out what I did wrong. This weekend I installed new plugs ,wires, and a msd tfi blaster coil on my 88efi F150 w/300I6. No problem ran great! Next day I install the msd 6a box, using the wiring harness, makes this a real simple job. Get done ,connect the battery and she won't start, no spark. I went back and double check that I didn't accidentally unplug anything else in the process. Everything looks in order. So I pull the 6a unit out put back the old coil and still nothing!! I had nothing out of the ordinary happen during installation, or when I reconnected the battery or tried to turn it over, but I also can't get it to run. Any ideas? Thanks Scott