Welcome to the forum!

As far as stock brakes, you'll burn them up at the high performance tracks- or at least I did my first weekend out. Stock should be OK for autocross.

I had metal brake lines made by Porterfield and also put on Porterfield racing pads. They had done well until recently when I have some grinding like sensations, so will put on another set of pads before my next race. Ouch, as those pads are $470.00. Also, use Motul 600 or Castrol STF (this may not be the correct name) brake fluid. You must have better brake pads and fluid for the road tracks like Gingerman, etc. I'm at Putnam Park in Indiana.

You may have tech issues with the roadster, as you will have to put in another roll bar. I've had no problems with my coupe. I did install a 5 point harness.

For the road tracks, things really started to happen for me when I put on Michelin ProSport Cups. They are expensive and I might get 3 days at the track, but boy do I stick.

I'm 5'10" and fit OK with my helmet, but at 6', you may want to put on a helmet and see if you fit OK. Some of my instructors were tall and fit, but just barely.

One final thing: Listen to what we are telling you. Get an SRT6. I race with the autostick and do just fine.

Good Luck with your racing endeavors. Viva Crossfire!!