Hi Trevor, Talking of GT 40s and a level playing field, when John Bendall and I raced his FIA 289 at the Le Mans Classic, we were beaten by only one GT 40, with 4 or 5 spitting out our dust, some way behind! Give me another 150 bhp with a 427 and you could sit back and watch the show. As I said before, people were amazed how the Orange Mk2 Cobra with its agricultural leaf springs, could beat a state of the art Ferrari F40 with all the bells and whistles. The Ace and Cobra chassis is quite special and for some reason it works very well. However like any magic, it doesn't bear analysis. If you jack up the front of an Ace, the front wheels assume ridiculous positive camber and toe in, but somehow on the road or track it works. We once tested the torsional rigidity of the Orange Cobra. We built a jig, and bolted the rear hubs to A frames and replaced the shocks with solid rods. We put a pivot under the front spring tower, and applied a twisting moment to the whole chassis via a 10 foot solid bar, bolted to the front of the chassis. We all fell about laughing, as it twisted like a toffee Curly Wurly! But again, don't knock it, because the flex in the chassis is part of the suspension, and somehow it works! There is another story about why we found 17 inch wheels with low profile tyres don't work on a Mk2 chassis, but I had better save it, and get on my weekend list of chores! Tomorrow (Sunday) I'm racing David Emmans' Ace Bristol at Brands, if anyone is about.