Z28

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Another good way to tell a restamped distributor is by the upper housing diameter, it should measure 3.810 where the numbers are and the upper undercut area for cap should measure 3.795 for approx .200 before it gets to the 3.810 diameter. If you put a distributor cap on a restamped hsg it will move on housing if you push it. They have to turn the housing down to eliminate the original numbers before restamping so diameter is smaller than original. Another good trick is to spray the number area with brake cleaner, if it’s been welded up and restamped you will see shiny areas because of the different metallurgy of housing and filler rod used.