Umm you might want to pay Earls a visit. Trust should most likely have one for your car... i'm using a trust kit.
Earls in quite exxy, but worth every penny. Just like ARC... they are amazing... but veeryyy expensive! You get what you pay for tho, and an oil cooler is not something you want to 'save' on! Neither are gauges. i wouldn;t trust anything else but Defi.
First on the list would be look at your brakes - they cop an absolute beating on the track. Get yourself some good pads (Endless, Ferodo, Hawk all have good track offerings) and change your brake fluid (Endless RF650 and Martini GS610 are my two favourites, although Motul RBF600 is also very good and well priced)
If you're due for a set of tyres have a look at something like a set of Falken Azenis RT615 - they're a R spec tyre but on the street side of the scale so you can use them for everyday driving as well. They have nice big chunky outside blocks so are better at copping a beating without falling apart.
Definitely do an oil change before you head out there. Also consider gearbox and diff oils as well. Fill up with good fuel before you hit the track. Take a bottle of drinking water with you as well. When you get to the track don't worry too much about how fast you are - just take it easy, learn the track, find out where your braking points are and keep it smooth. Then work up the pace - brake later etc etc...
I reckon your biggest risk is that your radiator may be clogged and so you might overheat. A bigger rad would fix this of course, but since your motor is stock, I would say that a restored stock radiator would do the job. Your engine already has a huge oil cooler underneath the rad btw.
Getting the stock radiator inspected and cleaned out will prolly cost about $200 or so. Also make sure that all of the plastic ducting and panels in front of the radiator are still in place. The FC has the radiator in a weird spot, and so if the stock plastic panels have been removed, then the incoming air can just go around the radiator instead of thru it.
Apart from that, the only other reliability things would be (as many have said) to change your brake fluid, and inspect your pads to see that you have at least 4-5mm of meat left. And you should get a boost gauge anyway and we've talked about before and what Justin said is good advice, if you keep your hot laps to only 5 at a time, then that will keep the temps down and the car happy. And never come into the pits without a cooldown lap. If you're still having probs with temps, turn your heater on full bore to give the engine some extra cooling (not so cool for you unfortunately)
And that's it really, that will take care of the car (you've just had a service recently anyway), just go out there and have fun