Yup. Remove the moot mount nuts & raise the motor with a jack or engine crane. Be sure to use a bit of scrap ply to spread the load on the pan...you don't want to crack the bottom of the pan. Then I'd put some more scrap 2x4s under the mount arms to give some room. It'll still be a pretty tight squeeze, I'll bet.
A rubber mallet is very helpful for breaking loose the gasket material.