That's the car. Well found. The original car has been a previous puzzle but this re-incarnation is in effect a different car.
Through its history the Vauxhall motor was upgraded to a tuned Zephyr, and later to a Ford V8 (believed to be first a 260ci and later a 289ci), owned by Geoff Brown from 1958 who probably started the ball rolling with the Zephyr.
In this photo it has a Ford V8 and it was quite successful in sprints and shorter races.