msd 6al install now no start

[sbc10guy]

Hi guys i just installed an msd 6al box on my truck and now it turns over but will not fire. I have check my wiring a good ten times and i cannot see what may be wrong. I have an accel 4 pin hei distributor. I used the supplied harness in it and have checked my 12 v switched source multiple times. Im at a loss on what it may be. The original box was pretty banged up even though the box it was shipped in was in perfect shape. Hopefully it was not damaged before shipping or a bad return sent back to me. Anyone have any ideas?