I found a 1991 NAR S&T Certfied Motors listing and it has this:

CENTURI ENGINEERING COMPANY (ENGINES DATED 1975 OR LATER ONLY)
18 x 70 MM B8-0 B8-3 B8-5 B8-7


Not sure what the significance of the above is... but it seems to indicate that perhaps the NAR as late as 1991 had them on their cert engine listing?


terry dean

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