Completely different but I bought an ex Group N Peugeot 309Gti for a track car because it had all the safety stuff already on it....full roll cage, plumbed in extinguishers, rally spec seats and harnesses, double throttle springs, brake pipe protection, etc, etc. It had standard profile wheels and tyres but I bought good tyres for it (might have been Yoko 021R...it was a long time ago). I actually found that the "feel/give" from the standard profile tyres added to the fun (albeit not to the overall speed ). They were very light cars even with the roll cage - I stripped everything else out that I could (and got polycarbonate windows, etc. The brakes were always the issue however, even with Mintex race pads and posh fluid - I really needed to spend a bit more...but I would just put in a few laps then have a break. I was just trying to do it all as cheaply as possible. Naturally if I had a bigger budget who knows but it was still great fun and the guy who bought it from me just carried on as I did. Good luck chaps