the z-bar can be different as well!! i have an ohc6 car and a 400 was in the car when i got it. different z-bars between the 2. another solution would have been to shim the pivot ball with a washer behind the ball to block mounting surface. it looks like it should be out a bit more but its better than what it was!!!
Andy
due to budget cutbacks, the light at the end of the tunnel has been disconnected for non payment.