I have a 2 post lift at my house and have never really noticed any flex in my ride when I lift her up. Most verts doors will not open or close when lifted or on stands, normal. I am retired now, but work for a guy who has 102 cars, mostly chevy and fords,1 69 charger 440 4 speed, and one 65 belvedere 383 4 speed are the only 2 molars he has. All of his verts flex when lifted or on stands, so it's just not a Mopar thang