Chevy V8 W/Internal Module Distributor And Black Cap Ready-To-Run Distributors Include A Built-In Module So No Control Required And Supplied With Black Cap MSD IgnitionA maintenance free magnetic pick up accurately triggers the module. The increased output of the amplifier easily outperforms stock ignitions and will smooth out the engines idle, improve starting and provide a much higher rpm range. The Ready to Run features MSD's adjustable mechanical advance that allows you to custom tailor an ignition curve to match your engine's needs. There is also a vacuum advance canister to help improve economy. For positive