You dont want a too light a car for track use as mad as it sounds, good weight distribution is a must for a good track car.
Mate with a Starlet GT Turbo running 225+ bhp and weighing a little under 800kgs and its fast in a straight line but not as fast as you would think on track. Its has 4 pot Willwood brakes at front and under braking the rear just wants to lift so effectively has 2 contact patches to slow down. Yes you could say more load on the front but the rear tyres and brakes provide no resistance plus gives an unstable rear end, you also cannot trail brake because the rear ends so light it slids out.
During cornering the rear skips very badly on the smallest of bumps so less grip plus when he accelerates hard out of a corner the front lifts up a lot due to the power which gives even less load on the tyres, less grip. Its fun but a handful and not fast I dont think.
Its has all the mods you would need, LSD, Suspension, Power, Brakes, Cooling. Its got everything but its too light. Wouldnt like to know what the weight distribution is.