You are correct if you are saying standard equipment. Or maybe you are saying standard not power assisted ? The 1970 340 swinger along with the new for 1970 duster 340 came with power assisted disc brakes as standard equipment. These were the four piston kelsey hayes small bolt pattern units.
My all original '70 Swinger 340 (with the build sheet) came with non power K-H disc brakes and non power steering. Strangely enough, it was ordered with factory A/C. (code H51).