Well I now have this to fit...
I'm thinking it should take a few hours. Engine onto hoist, remove engine mounts, remove gearbox bolts and slide the engine forward. Saying that its probably a walk in the park to just hoist it out all together at that point as there's really nothing in the way and only a few hoses to remove.
I hope that will work as my rear gearbox mount was a real bugger to get in and I recon will need to be destroyed to get out. Wish I had designed it differently now.
As for the flywheel I found that most 1.8 flywheels are 9kg. 1.6 is 8.4kg however the 2003/MK2.5 1.8 is only 7.6kg so looks like this one may be lighter than my standard to boot.
Cheers
Stot