[olredalert]

----Sam,,,Instant center ideally should be app. right under the drivers seat to under his feet. Using the 70 Chevelle as an example, there actually is no instant center as the cars are delivered. The upper arms actually angle away from the lower, longer arms. Thats why theres tire hop. Hop-stop bars reorient the upper bars rear pivot point on the pumpkin upward to gain an instant center. Install them and hop should go away. Other stuff can probably mitigate wheel hop (air bags, etc.) but I think they are bandaids. If someone really wants to race with GMs midsize rear suspension, drill the holes. They can always get patched. Or get another housing. Really good 60 foots are out there waiting......Bill S