Suspension - the important ratios?

[Airhead]

Thanks for the input BV.

When you say that the MX5 wishbones aren't suitable are you talking front, rear or both? The only reason I ask is that the rear mounts arent a million miles off the book anyway and in order to retain the track (and the halfshaft lengths) the rear wishbones will end up a similar length to the book and Mazda have already done the maths with regards to their rear uprights. I appreciate that the weight is different tho'...