I already compared the two and have a thread somewhere here from over a year ago , in detail with part numbers, of converting to corvair brakes with nothing more than the replacement of the corvair cylinder pins/rods available from your local parts store. The difference is the pin recess depth of about 3/8 inch on the corvair shoes. If you use corvair shoes with tempest pins , your pedal is bascially to the floor before the pins begin to press the shoe. Everything else is identical. I've been running corvair brakes for over ten years. Much cheaper than tempest shoes, and available. Hey, more shoes for me if nobody else wants to read my replies.
