Thanks for posting the photos of Chris Amon in the A40 Special.

Some background on the car : it was built in 1947 by my great uncle Des Herrick as a speedway midget and was very successful in speedway and in hill climbs. In 1950 it was sold to Herb Gilroy who had Ralph Watson convert it to a circuit car with the midget Terraplane engine, a Bugatti gearbox and a Model T diff converted to IRS. In 1956 it was badly damaged in a Wellington hill climb and was totally rebuilt by Bruce McLaren and a few mates. In 1960 it was sold to Chris Amon as his first race car and by that stage it had a very hot A40 motor - Chris replaced the Bugatti box with a Singer one. The car then had many owners and was "improved" over time. It ended up in a Wellington warehouse for 20 years where I found it in 2005 and returned it to family ownership. It has now been de-modified back to 1960s configuration and I race it from time to time but currently it is having trouble keeping oil in the engine after about 3 laps!