Strange sound when braking like a bad strut mount plate

[wingrg]

Hi, First my ride info 1997 Mustang GT with caster cambles, Just have a noise if a apply the brakes hard, is the same sound like you have a bad strut mount plate like rubber, but i have caster cambles that don't use it, I change all front control arm bushing for Steeda, also i change all my struts to KYB, I don't know what else to change don't want to spend money in things that i dont need, sound come from the front driver side, i jack the car and check but nothing abnormal, any experience to share going to be apreciate because this noise have me very mad.

Thanks!