Carl,
I have them for my 69. I use them and it’s nice to be able to jack the car up in a limited space garage but I regret the purchase. As stated by others connections sometime leak, there heavy and not the easiest to maneuver around, placement under the car can sometimes be a challenge, many users and myself often have issues with the jack not dropping completely flat after use which is a pain. To correct that problem Quickjack tells use to bleed both jacks but it often doesn’t work, however there are those who don’t have that issue so its a hit or miss. Jeff