Just a suggestion...I went to fire mine for the first time and....no spark. Dead, nada, nothing. How can this be...everything new including EVERY wire in the car (of course it was my own wiring design and wiring job). So could it be my wiring or the MSD box or the new coil or the new distributor or ??? It could be anything....but if you've got power to the ecu and the coil and just aren't firing it, perhaps your new dist suffers from the same as my new one didi: the reluctor gap should be about 0.008" and mine was set at about 0.080". So the MDS (or ecu in your case) never saw any engine rotation or pulses so never fired the coil. Maybe pull the cap and have a look!
Oh, and did I mention I also had a fuel leak at a carb inlet fitting? Yep, brand new line and gasket...had a pretty good drip going.
This stuff happens to everyone on here. Makes it that much sweeter once you do find the gremlin. Keep going, you will find it. We're all cheering for you!