Diff alignment

[Peter-C]

I'm having a bad day trying to line up the engine mounts. I'm struggling to line up the gearbox with the diff. I've centered the diff between plates SB4 but the diff flange centre is not in the centre of the transmission tunnel . Is this correct or do I move the diff over to the driver side.
In a nutshell should the prop run exactly down the centre of the transmission tunnel ?
Phew !!