Yes that has been pointed out to me and I had these thoughts (and yes it did hurt).
Option 1: fit the gear box first, turn the engine 90' to the chassis,turn engine with in chassis and bolt up. Could result in a few crushed fingers etc...
Option 2: build another chassis on the bench with tr1+2 removed , fit engine and box weld back up and worry about getting it out when it goes wrong....
Option c: forget the whole idea and fit an in line four pot but where's the fun in that.....
