Jeff,
We run the same chassis 240Z. Our first race at MSR we wore the outer half of our tires, mosty on the left but had a lot of rubber left.
Then we added camber. I think we may have too much now. We put way more wear on the second set of tires in the second race at MSR.
No Problem has been pretty accurately described as a cheese grader.
Two set of tires allows you to change tires half way and flip them at the end of the race which will prolong your tire life.
Regarding brakes, we have 4 wheel discs with more or less first gen 300ZX rotors running R4 pads. The brake are a bit aggressive but they showed little wear after the first couple of races.
Other guys running Z's at No Problem wore out rear pads on the Low Budget 280ZX. Between there 280ZX and anoter one, two of them had hydaulic failures, one was a front brake hose the other was a front caliper.
So to the guys that think just throw on pads, flush the brakes and go. You need to check your hydraulic system. Replace old rubber lines, calipers and your 20+ year old crappy master cylinder. They do crap out from this kind of use. No, they are not engineered for endurance racing!
Troy
#35 LRE
1973 Datsun 240Z