Do your track mods one at a time. Brake pads, fluid and oil cooler first. That will keep you on the track the longest at first. Once you start getting experience and getting faster. Then you can start doing other mods. Get a notebook and keep track on what changes you make and record their results.

Agree whole heatedly on the durability and longevity mods. You will be better off if you can get the most out of your sessions. Oil cooler was a big one for me. Now I'm looking to get better more heat tolerant brake pads. I haven't had any issue with coolant temps but I only plan to do events in the early spring, fall and winter when it's cooler out and there's no autocross.

Thanks for all the advice. I signed up for Roebling Road in January with NASA SE and can't wait for it. I just found out I have the dreaded oil gallery gasket issue and I should have everything back together by the end of this week. I am upgrading/replacing everything I can get to while the timing cover is opened up. Between that, the oil cooler, brake pads/rotors and new clutch I feel like I will have a solid foundation to carry me through HPDE for a while.