Mopar electronic conversion fires 4 cylinder only

I have assembled and run a 451 in my 69 Barracuda. I retained the mopar electronic ignition I ran on the original 383 and it was working well the few times I have run the 451 in my shop. Today the car was hard to start and when it did start appeared to run on 1,3,5,7 only. Header stayed cold on 2,4,6,8 side and plugs were wet. Anyone run into this before?