Don't know that jack but the original jack points of the quick lifts are for real use, not just cosmetic. If you want to jack on the tub use a plate that spreads the load. We use the doubled area under the front suspension for the lift and the area where the sponson meets the rear chassis extension.
Please review the post 'How to Jack Car' about 9 post below. I've used both the original lift and a modified floor jack as depicted in pictures. With the original lift you'll need some room to lift the car off the floor, but it is fast. Dennis O has them and they can be separated in half for storage.