I remember a Vixen driven in hillclimbs in Scotland during the early eighties,driven by a bloke called David Milne I think?.There was a magazine out at the time called"Scoop" and they did a slide type story in most issues about the exploits of this car and driver.I also remember his nickname was "smokin joe" due to the reek comming out of the exhaust
probably a common thing with imp engines then