Yeah not sure on the repop, but Chevy did make a service replacement of the Z/28 manifold. They made 2 versions, maybe 3. One with a fill tube, one with the fill tube area cast over but can be machined, and one there the fill tube area is completely gone. Only differences between the service replacement and production units was thinker flanges at the ports and a bowtie on the back runner on the replacement intake. I have 2 of the intakes and unless your really look and know how to spot, most assume is a real deal unit as it has the snowflake in the right spot.