No. the groove is to oil the cam gear driving the distrubutor. Take a look at the distrubutor shaft. about 3/4 the way down there are two bearihg surfaces with a galley for oil in the middle. ON the bottom bearing surface, take a dremel tool and mill about a .035" grove from top to bottom. That wil leave some oil to drip on the cam gear. That little tid bid was included in all crane cam kits when they were in business. Works for me.
