I built a 320i e30 with a 535i engine and gearbox seven years ago,its actually a headache you need to get 333i engine and gearbox brackets the sump needs to be modified propshaft also needs to be modified.I had fitted gotech management on the car and exhaust and branch was built by kumaren from piper racing in durban.Car had lots of torque but i ended up selling it and buying an e36 m3.