96capriceMGR, Having done a lot of suspension experiments, I was looking to focus on the chassis for a while. Every generation of the Corvette for instance has been engineered with a more rigid platform than the last.C5 was much stiffer than the C4 and I've been reading about how the C6 chassis will be by far the most rigid yet.It's the reason the Z06 is only built as a hardtop. Makes sense when you see the trend in supercars and racecars using carbon fiber and structural adhesives. On my now two seat 98 B4C Camaro I used a structural adhesive called Dynaplate to reinforce the sub frames on the inside of the car,built a full frame underneath, triangulating shock tower brace front and two point rear, wheel well and floor braces, hoop and arms where the back seat used to be. Hoop welded to the frame. Put a jack in just the right place and you can pick up three wheels and still open and close the doors without binding. Steers like no F-body I've ever seen, but the ride and handling are both vastly better, because the suspension can do it's job without flexing the chassis or torqueing the body.On northern New England's frost damaged roads it's tighter than a friends Testarossa, which is a testament to what modern materials can accomplish. So I've ignored the Impala's chassis while learning how far I could take the Camaro's, but now I want to see just how much a B-body frame can be improved. I'm convinced that it's real easy and a mistake to have too stiff a suspension, but there is no such thing as too stiff a chassis.