Still lightweight though. Just look at any late 90's early 2000's rally car, they all ran quite 'small' brakes compared to modern heavy stuff. Its a lot of extra unsprung mass also. That cars running 15" wheels and what look to be AP front calipers. Alcon/AP etc don't have an off the shelf solution, you're looking at bespoke brackets/bells/discs/calipers to suit. loads of space under a 14" wheel.