It is possible to put a wedge in it. In this post, he moved the engine forward with modified mounts. Once you start those kinds of mods, there is no place to stop. You've changed the relational dynamic of all the components. Simple bolt together really isn't an option once you've done that.
The Stifflers trans X member has enough adjustment to make up for a slight forward mounting of the engine.
You might need a different driveshaft length tho