This video explains how to find the Top Dead Center ( TDC )in Compression Stroke and set the correct Ignition Timing when the Distributor is Removed from the Engine or the Spark Plug wires have been unplugged without marking their original location.\rbrThe video also explains how to set the correct Firing Order and how to find out which is the Number One cylinder on an Engine.\rbrThese steps are also useful when Installing a Brand New Distributor on a Crate Engine and you need to locate TDC to set the correct Firing Order.