I wouldn't say your crazy but I do think your going to have a bit of fun. Motor mounts are available for most engine/tranny swaps nowadays but there are still a few shady spots... yours maybe one of them, I'd check on that first and foremost.
Other than that do some reading... I'm sure someone, somewhere has done it. Just when you think you're the first.... your not!
I say do it... nothing like a one off ride... As with turbo's.... build the motor for it, I'm sure I'll get lots of flak now from ppl saying any motor can take a little boost, hey there right... but personally a little insurance is worth every penny. You don't turbo to drive miss daisy... you turbo to out drive the guy who just blew miss daisy's doors off, so it's worth the build before you start the punishment!