I've never done a Ford 500 but some vehicles you need to block the back of the motor so it doesn't drop. I've never had to pull an axle.
Using a lift on a Taurus I used a cross bar across the strut mounts and hung the motor on the support and dropped the frame under the front of the vehicle. Haynes manuals usually give instructions on this job.
I made a link for a Ford I think is close to yours. Note after you open link at the bottom the arrows to click to open more pages.