Found some nice stainless wiper arms, 15 1/4" long, new old stock, ex Daimler!
my spindle adaptors arrived too, so I bored out the hole to 7mm, then tapped it out to 8mm to match the threads on the Mazda spindle. To match the flairef base on the spindle I stuck the adaptor in the lathe and flared the base to match.
[IMG]
[/IMG]