i don't mean to sound like a cynic - but you'll need a new everything.

new engine mounts, new gearbox mounts, new shifter hole, new radiator mounts and position for the oil cooler (bolts to underside of radiator), new tailshaft, new brakes to match and if you're not nice, a new diff!

depending on the final position of your engine, you may have to either scallop and re-strengthen the crossmember, or custom make a new sump pan to get the engine lower in the vehicle. why? to save you having to fabricate a new tranny tunnel to take the gearbox bellhousing - an engineering nightmare for a street car in QLD or VIC.

the great things about rotaries are, you can effectively ditch the sump and setup a dry sump system due to the rotor not requiring the sump in it's factory position at all - so you could remove it and fit a reservoir elsewhere and a nice PHAT piece of 20mm aluminium plate to strengthen the motor and stop the rear plate shifting under high load.