Great topic. In the mid 70's I did time trials at Lime Rock in my 73 240Z which I bought new (sigh). The first outing I had no brakes after the first open practice. I upgraded the pads (don't remeber the brand) and changed the brake fluid to Castrol Dot4. No more fade and the car did well from that point on. For my needs, the stock setup worked. I also had slicks, the usual Bob Sharp acquired springs, koni's and sway bars. Off topic, but I was impressed with the improvement in rigidity from adding a bolt-in 4-point roll bar.