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Also from the 1966 MT Ray Nichels shop tour story, this is what it meant to have factory backing. This group of 42 single carbureted Race Hemis is interesting since they’re all K-head units. If you don’t know, the K-head is identified by the flat leading edge of the rocker cover. Later 1966-and-up Street Hemis were redesigned with a gentle curve in this spot to allow installation of a power steering pump. Also note the presence of three openings on each rocker cover, two for breathers the third (the tall one in the middle) being the oil fill tube. Unlike the chrome plated steel rocker covers used on 1964 K-head Race Hemis (and 1965 aluminum A-990 Race Hemis), these Track Hemis appear to have painted rocker covers.