Thanks for your responses everyone! I don't really plan on racing, but my brother works at Skip Barber Racing School which means I have access to the track. Not that I'd be racing against anyone, but I might bring it out on the track just to (safely!) see what it could do. I think adding the power assist might be a good compromise for now, then move on to front or full discs if I needed them. So glad to hear other people have found it pretty easy to do!