Yes indeed, the HD's handling and braking are well documented. If anyone's interested I wrote a review of the HD-HR X2 Holdens in racing and rallying as part of the Racing Garage series (see link below). Australian Rally Champion Bob Watson is less than complimentary about the HD in that review. As a rally car, he says it was the worst he's ever driven! https://club.shannons.com.au/club/news/racing-garage/hdhr-holden-x2-the-generals-mysterious-1960s-muscle-car/