[Anthony]

What A Thread !!!

Lew (if you're still listening), for what it appears you want, I don't think it matters which model you get. Whether a leaf spring or coil spring chassis, they will do what you want them to do. I think one significant difference in the chassis, is that with the leaf spring one, you may not be able to adjust camber/castor. I think that was the case on all of the csx2000 cars, and maybe on the new kirkhams leaf spring chassis. On the shelby leaf spring chassis, they incorporated an eccentric cam where the hub fastens, so you can adjust castor/cambor. You need to talk to Kirkham to see if they can do it on their cars.

The leaf spring chassis was designed in the late '40's, I think. The coil spring chassis was supposed to be an improved suspension, of which, not including the larger 427 engine, was supposidly only 50 lbs heavier, including the larger frame rails, body changes, and extra suspension components.

I think shelby only "buys" unfinished bodies and chassis from Kirkham, and then Shelby supplies and finishes the rest of the body and suspension conmponents. So even though Kirkham supplies the bodies and frame for the aluminum CSX4000 and CSX7000 cars, they still have some differences between them (Kirkham vs. Shelby) other than just the name.

Argo1,

actually the superformance and csx4000 cars are very different. You need to compare the bare chassis's beside each other to really see the differences. Yea, they both look the same, but the chassis/suspension design is completely different. I'm not saying the superformance is a bad car, in fact, I think it is a great car, as my buddy has one, and I drive it all the time. The superformance uses modern design, passenger car components modified to "cobra" specs. For example, the control arms are stamped steel, with eccentric cams for alignment adjustment. The CSX4000 cars have large diamenter threaded rods for upper and lower control arms. The csx4000 suspension components are interchangeable with the csx3000 cars, where as superformance's are not. Obviously, the closer you want the car to be to the csx3000's, the more expensive it will be. I would think superformance believes it designed a chassis "equal" to the original, but cheaper in cost because of using current production suspension components.