Enjoying this Ken - as a younger fellow used to by NZ Hot Rod Magazine - known as the longest running NZ car magazine.
Keep em coming ..

Went to Wiri in its early days, competed at Meremere once and at Thunderpark Napier - been back to Meremere about 15 years with my son to see the Mopar Nationals - he is a Mopar fan.
First Hot Rod experience was probably this grass sprint meeting, near Riverhead.
Croydon Thompson is his F100 - Custom - Croydon was one of the first guys in NZ to make Custom Mag Wheels back in 1971.

Name:  Ford F100 early 1971 Croydon Thompson #2, Riverhead Grasstrack v3, CCI18102015 (2) (584x669).jpg
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Drag Racing at Meremere in 1977. this was a Car Club rather than Hot Rod Club meeting - Jaguar drivers event.

Name:  Jag Drag April 1977 #5 Jaguars CCI24122015_0001 (752x780).jpg
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Somewhere in my archives is a booklet on Drag Racing in the USA in the 1960's and the set of NHRA rules - must dig it out.