Having problems with newly installed engine, don’t have a spark. Engine turns over fine on starter motor but there is no spark coming from the coil ht lead. The distributor signal cable (yellow 3 pin plug to distributor) connected to the ignition amplifier is broken, but as I am running carbs I figured this wasn’t needed. I tried connecting a light to the positive and negative terminal on the coil and nothing happened, so I guess no power is going to the coil. Everything was working on the previous engine when the dizzy signal cable wasn’t broken.   Any ideas???