need advice on a new racing jack

[Maengelito]

but they are way taller at the rear so unless you jack from the rockers, its pointless. I jack up from my subframes, so I have to use phone books.

Cut up some 2x6 squares and drive on to them - problem solved

You can also use old brake rotors. I just put them down on the ground and drive up on them. It gets me just enough clearance to slide my jack under.