I plan on doing that soon. If I understand right, you have to weld in a small piece of steel to mount the dual circuit master cylinder. That's all. ----- Original Message ----- From: ATX BUS To: TCB TCB Sent: Wednesday, September 16, 2009 3:25 PM Subject: [tcb] Another Brake question I want to replace the master cylinder on my early 67. It has the 66 style MC. I was talking to the guys at WW, and they suggested that I consider converting to the 67 style for more safety. Has anyone done this? They made it sound easy. Jeff (atx_bus) 66 So-42 67 sportsmobile camper