IMO, I'm thinking "Waste of time & effort." I don't think you'll notice any difference at all in anything by doing it. Plus, I kind of wonder what else will end up cracked and/or broken by hard mounting your engine like that. Nothing's designed to endure that. I suppose if you wanted to do something, I'd incorporate a damper maybe, but not a hard, rigid stay-rod. That just scares me.
My advice is to just make sure that you're OEM engine mounts are in great, if not brand new shape. With an engine as light as your EW, that should be more than enough. It's all I've ever done, including with the heavy B-series and "holy hell, that's heavy!" H-series engines.