The 71 frt struts, ball joints, brake rotors & brake calipers are all different from the 74.
The frt control arms are interchangeable, later arm will have the brackets for sway bar links. Rear calipers are different as well, late have dual bleeders and early single bleeders but the calipers are interchangeable.
I think the rubber brake hose are also different between 71 & 74 but it depends on which frt struts and which rear trailing arms are used.
I have a 72 with later rear trailing arms and the hoses I ordered don't fit the bracket on the trailing arm. They function but are not secured to rear trailing arms as they should be. I'm in the middle of converting to 5 lug suspension and will replace the hoses as part of that.
Jim