When I was using the coil packs I fabricated the crank trigger using a LS crank wheel and machined down a LS camshaft sprocket for the cam sync. Had problems when engine was warmed up. I would loose either cam or crank signal and it would not run correctly. So I took all that off and now I'm running all the Holley hyperspark stuff, distributor, coil, CD box. Runs great now, no problems. This is on a Holley terminator x ECU.
