This could be a bit of a dumb post, but as usual i'll post it anyway[:D]
A few of us at work have bought newish cars, most of them are pretty rapid such as a SEAT cupra thing, BMW 330 a Ford Focus ST and an Audi TT. Getting more power into a TR7 is reletively straight forward as is getting it to handle like a go kart but how far can bolt on goodies actually get you when it comes to keeping up with the above cars when it comes to performance and handling? At what point would you say you'd need to strengthen the rear suspension mounts, add a watts linkage etc etc. Any stories of that time you made mincemeat of a Ferrari or porsche would be ace!
Rob.