Ultra Series Crank Trigger KitBig Block ChevyFits 8" Diameter BalancersPassenger's Side Mount Fits: O.E.M., Fluidampr, ATI, Fischer, JEGS and other Big Block Chevy 8.0" diameter dampers and also fits all Big Block Chevy balancer receiver bosses.Crank Trigger Kit is based on the popular, flying magnet-style kitsShortened adjuster arm for better fitment with two-piece oil pans and containment devicesBlack anodixed finish for long-lasting good looksMoroso has designed the trigger wheel mounting holes to "phase-in" the wheel, to allow a more centeredsensor location. No more having the sensor run out of adjustment before the engine is even started!The sensor mount billet block is designed as a flush mount for clearance so it will not stick out the backand run into the oil panCrank trigger sensor comes with a common plug style to easily hook to any popular ignition box withno modificationsKit mounts to passenger-side of block only and has two sensor locations for non-motorplate applicationsOptional Moroso Part #60025 Adjuster Kit allows the Crank Trigger Ultra Series Kit to be even more user-friendly