i made two....
the LJ hard top weighs around 200 lbs....IIRC. i had originally thought ~250, but now i think thats a bit high...i think the SWB TJ hard top is ~160 lbs?
my first hard top hoist was actually my first welding project. used some schedule 40 pipe and made a big H-pattern. straps the hard top to it, and lift the top into the ceiling with a HF 440/800lb electric hoist. i could install/remove the top by myself with this...but a helper to guide the swinging top was almost a necessity for my tiny single car garage.
second one i made is just some tie-down straps & heavy duty hooks drilled into the rafters. i moved into a different place, with a finished garage and the neighbor's bedroom upstairs, so i couldn't utilize the rafters to mount the hoist.... now I need a helper...we take the top off by hand, lay it on some 2x4's, and then slowly lift it up inch by inch with tie-downs. it works.