Okay. Here's my story.
I managed to pull a 1:14.196 at Tsukuba (good for 2542nd in my run). Since the regulations are fairly strict, your only modifications will have to be Drivetrain, Suspension, and Transmission. Everything else is on driver talent. The first hairpin and the sweeping final corner were both the critical parts of the track to get right. Sure wasn't easy, but I was confident enough in my run.
One of my PSN friends used a Ferrari 458 Italia at the Neo-Rome (to diffrentiate from the classic Rome Circuit) Reverse trial. I used another Ferrari- the F430 Scuderia. It took me 1:16.047 (good for 2039th at the time) to get around Rome Reverse in my tuned F430 Scuderia. Part of my problem with the run was in trying to keep the car stable powering out of corners. The car wants to jump from its stance and explode with speed. It's good for a high-speed course; but on a track with some technical corners, this can be a fussbudget. While I miss the old Rome Circuit, I will admit this about the newer Rome Circuit- it is much more punishing on suspensions than the previous Rome Circuit. A poor suspension setup here will have you in serious trouble. A good transmission setup also helps here. When I finally figured it out, I was able to cash in a lap good enough for Gold. I oculd have used my Premium Ford GT, but I needed to dust off the F430 Scuderia and let it play for a bit.
Now when I saw the top times, the Honda NSX-R Prototype LM Road Car was among some of the top times. So it wasn't just the (DAMN I want this car!!!) Nissan R390 GT1 Road Car that took the top spot on the tables.
I may try the Drift trials as well. I will let you know how that goes if I do well enough.