64 impala ss disc brakes and power steering

can i add disc brakes and powering stering from another general motors car to my impala that does not have it. i have access to some older model gm cars is the reason i am asking or will it be better for me to buy it new. can it be done with ease and with which cars. thanks

Yes it can be done. Easy is relitive. I don't remember which make and model switch but I am sure someone will. I know you can buy aftermarket new.