No they are shorter lengths between the flats for the three piece bushings on 73 up. the older fine thread are longer and can be used if you have the washers and use the one piece bushing. The older washers are coned and face each other. the newer washers are cupped and face opposite . The coarse thread with the three piece bushings allow for more suspension travel without bind. If you were to see both setups side by side without the stabilizer attached. there is a big difference. I have pics on a post somewhere showing the difference. The newer setup would be a plus on your drag car. I thought I mentioned that when I was there and you were parting that black swinger. 73 up is a much better set up. for various reasons not only the struts. Steve.
Hey Oldmanmopar how've you been? I've got a quick question: besides the coarse vs. fine threads on the front part of the strut rods, what's the difference? Same diameter and same length aren't they?