The rotors look abit small for a brembo caliper... definitely overkill for the brakes, he should consider making a brake bias controller or swap his brake distribution valve to balance the strong braking...
watch too much cartoon ah u? heh heh heh.ModMaestro said:turtle turn? what's that? probably not if it is what I think.
But cars with rear drum brakes converted to disc brakes are prone to get the whole rear end torn off from the braking force.