My son has been doing a bunch of work on his Mustang, and picked up four of these "Race Ramps Wheel Cribs"
race ramps.png
Two pieces on each, so you can "stage" it up 6" per corner, then another 6" to get it up a foot to bottom of tire. Super light weight, high density foam. They're very cool.

He put on a pair of frame stiffeners that run beneath the rockers, so he can now jack it at any point, too.