I have full soft doors, One day it rained and a friend at the shop had his CJ-7 doors, Full doors at that. I put them on and they shut and fit fine for what i needed at the time. I noticed on the rides i took with them, The smoker vent is hard to open as the dash on the YJ/CJ is more compact and the TJ's stick out with vents and HVAC and all. The door handle in the inside was hard to open as well as its up towards the top on the front of the door. The latches hooked up fine, With some adjusting they would fit good for a DD on rain cold days. But style lines are different and interior is off and they rattle, But are a cheap alternative and can be switched. It would be easier if you had YJ/CJ doors and just bought some YJ door strikers. The tub mounts are going to be the same, If they are off, Just re-drill and use tap and die to fix it.
Safety?? My 99' the has full hard doors and top still have the sticker saying they are only there to protect from the elements. They would not be less safe, So its better than nothing. Good luck, Just find a friend with what you want and see if they will let you try them on, Wont hurt.
Edit: Didnt read the link, But looks easy and he only posted the safety as for reason to cover his *** if somebody tried to blame him for any problems. Good write-up