Preferably, The 2 sides of the frame needs to be flush towards each other while you elevate it. Try this on each side and ensure they match up when they're every one of the way up. When you have them at the appropriate height, you'll need to jack one https://auto-body-repair-estimate27260.blogkoo.com/getting-my-can-i-drive-with-a-bent-frame-to-work-35762127