I got the 514 back on the dyno this week with the new coil on plug setup. This uses the Holley 558-117 universal COP main harness. We had some issues with plugged injectors due to the Q16 fuel, but eventually got it all sorted out. Engine made 880 hp on C14 fuel which was pretty good. COP runs nice but the wiring is a little more complicated. Getting rid of the distributor can be an advantage on a BB Mopar since the distributor can get in the way sometimes.