Didn't get to cutting brace tubes tonight. My mate James came over to inspect progress and we ended up swinging the motor and gearbox up into the newly created engine bay to check clearances etc. In general it's all pretty good although I'll probably need a remote oil filter because the factory location lines up with a chassis rail and will probably be impossible to remove.
Anyway, here's a pic of the engine in place.
Still need to cut and fit the four side braces and I'll probably do the two top front braces at the same time. They'll run from the strut towers forward to the middle of the front of the engine bay.