The Wellington Car Club has a huge archive of old racing club books, Heatway rally and photos.
They have been very fortunate to have it all put on to digital records to read, and man there is a lot of reading. Approximately 70 years of achieves!
http://www.carclub.co.nz/default.aspx?Page=118
There is much on Sprints & hillclimbs such as Alexandra road, Houghton Bay and Palmer head.
I spotted a article on Bruce McLaren also giving a commentary on Monaco.
Happy reading