I think, as I've said elsewhere on the boards today (Hello, everyone, I'm not here.
, that Street Rod 2, because it was about modding, never achieved perfect simulation. Given the higher standards today, obviously we want this game to be better than NFS and this other junk that's being produced right now, but I don't care if these cars are not perfect replications of what the cars are like in stock trim. Indeed, they're supposed to be hot rods. A stock one should run roughly like a stock one, but being extreme about it might not be a good idea.
On another point, making this game port-able is also a good idea, including for mobile devices, as the computer gaming world may be in transition to (a) new operating dominant system(s) at the moment. Windows and Mac OS are in decline, while Linux, Android (okay that's Linux), iOS, and even Unix are all being used more than ever before. I'm sure I'm not the first person to say this.
I would be happy with either of the above engines, and will endorse the engine most supported by the people who have to write the code. If I participate in this project, I expect more to be involved in content generation, as I was on Redline (although independently with many other plug developers, not while working for Ambrosia). Again, I won't be saying anything new if I press the coders to decide before everyone loses interest. As of now, this project (according to what I've read) has been even longer in development than Redline.