From c.1981 to 1987 the SCCA allowed watercooled SV's to run in their Formula Continental/FC class with some restrictions from the pro SV spec. IIRC, they had to use small bore Webers instead of the pro SV injection, 6 and 8 wheels, etc.
SCCA runoff winners in FC from 81-87 were all in RT5's: Jim Hickman in 1981, Terry McKenna 1982-84, and Lou Rettenmeier 1985-87.
After that, the SCCA bumped the SV's into FA, allowing them 1835cc and 8 and 10 inch wheels (as the pro SV's were running) along with free brakes, and that's where they run today in the SCCA.
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