I accidentally deleted somebody's message but believe the question was whether Bill Fisher's "hot rod" book (1970) has anything on dual ports. It does. He writes (p. 49): "1968-70 fastback, squareback, notchback "Variant" engines have dual-port heads and 1600 cc displacement. All 1971 VW's have these heads. [...] ultimate configuration for high performance. [...] These heads, P/N 311 101 355D, cost about $45 each at the VW store. Intake-port area on these heads can be vastly enlarged by the "square-port" technique developed by Gene Berg. These are "the" heads to use for all-out high-performance VW engines, [...]" -- Sami ('75 Westf.) dakhlia@wuecona.wustl.edu http://wuecon.wustl.edu/~samid/
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