Adam here is a link to Jeff's scratch thread. He changed to Girling race brakes. He had to change front steering arms and bend them. I believe they are the same as your arms. The link is to some pictures i posted of the void inside of the steering arm. My guess is that your arms will have the same voids to a lesser or greater degree. Jeff got his bent and I believe they have been working well. Go back a few more pages on Jeffs build o see what was involved using the arms.
289 progress........