Full Energy Suspension kit need advice

Make sure you Get the correct kit. up until 72 the strut rod bushings are a different style. The 73 and up strut rods have a shorter flange to flange length and require a thicker two piece strut rod bushing with a sleeve . 72 and back are one piece usually but two piece are available without the sleeve.

An easy way to tell what rods you have is the 73 up have a coarse thread in the front the 72 and back are fine thread in the front.