72 back use those bushings, push them through from the back torward the front. 73 and up use the 2 peice and the new cups face female out. The 72 back have a shoulder built on the strut rod that the outside washer bottoms on. The inside washer has a bigger hole. The 73 up use a three piece with a sleeve so the strut does not have a shoulder built on it, and the strut rod is different. The length is different at the threaded end for the use of the two peice bushings, I you use three peice where one peice should be it don't bring the control arm against the pin at the innner lower bushing. You will have to pull it against with the nut. If you use the slip in urathane lower bushings , your lower arm will back up when driving from the length being to long between the arm an the strut bushing . The rule on a-bodies, if your front threads are fine threads use the one peice. if they are coarse use the two peice. I am not saying you can't get them in but it does throw the alignment out , sometimes enough that you have to get off set upper bushings. I will try to post pic's of the different strut rods tommorrow. I have been down this road on many occasions. And yes the front of the bushing will squash alot . These bushings are to hold the arm front while braking so the most of the bushing pressure is in the front. One other thing is never tighten your bolts on any bushing unless your car is at ride hieght. This puts the bushing in the middle of its travel and prevents premature damage from over twisting. If you tighten them when the car is in the air and then let it down you aready twisted them to their limit. Now when you hit a pump or dip they tear away from the sleave. Now they won't last that long and you will lose firmness in the suspension. Two peice strut bushings have a male an female make sure you face the male back to prevent it from coming out of the hole when under pressure from braking.
