Body Mount Bushings...poly or gnx style stock??

[Phoenyx]

The way I see it ( and believe me I'm no expert lol) is, that like you said the frame is weak. But having it solidly mounted to the body should stiffen the whole package up. Otherwise, what's the point of all these body braces we all want so bad. I could be wrong in this, anyone agree?

 

[pontiacgp]

It does stiffen up when the body is mounted but what I would be concerned that if the frame isn't boxed then it would still move and twist and when on solid mounts the mounts would not absorb the movement as poly or rubber bushings would. I'm not sure what effect that would have on the body other than squeaks and rattles but if taken to the extreme I imagine the front and back windows would eventually crack.

when we raced a G body we had a full cage and front hoop with bars down to the rails on the front clip....even with upgrades on the frame and the bars the right front rail would move up about 3/8" in the corners....we were running a soft spring (600 lbs) large bar set up (1.6") so that's a higher rate then most street cars but it goes to show how much those frames can move even when worked on

 

[Phoenyx]

Hmmm, maybe we need to start taking a closer look at the hydraulic guy's frames.