True - But this has been hashed out ad nauseum (search button).
No place for a clutch pedal OR a clutch MCyl, little room for an E-brake relocation, firewall and tranny hump modifications required, exhaust re-routing, custom made replacement driveshaft, and so on.
Not only that, but it'll STILL be slower than the automatic. WHY? Because your gear ratios will be optimized for the torque and gearing of a Z car, not a Q.
That being said, GO FOR IT anyway!!!