Think I'm running a 24 pinion on an 89 spur in my Cougar - with my 6.5 - but then its quite a mild (fixed zero timing) Hacker motor. It runs cool & fast on this gearing

- the same motor & gears are used in my ProCat.
Mark.... your Cougar2 looks absolutely ace in action... when are we going to have a Cougar shoot-out at Hinckley?