the car came with p/b
when i press the pedal some what hard the right front locks up

this what i have done replace both front rubber lines replace caliper , front metal lines ,pro valve ,
swap rotors from side to side ,ck brake pads for oil & grease
clean
bleed system fine , nice hard pedal car will lock all 4 tires if hard braking ,soft braking is normal
can a bent right front control arm couse this problem i dont know where to from here

thank you

it sounds to me that you have a bad caliper.the piston is sticking when you applie the brakes. if it was me i would replace it.