Hey guys, I know this is an old thread, but I've just spotted it and thought I'd add my thoughts, seeing as the thread you linked to is my build thread (notice the username in each forum?)
There were actually a few little things we found out after we'd already made modifications.
For example, I found out afterwards that I didn't need to change the engine mount on the timing belt side. Unfortunately, this was due to the lack of info at the time.
I think that having a complete Charade and a complete halfcut provided HUGE benefits, as did having a MIG welder on hand, along with air tools, etc.
The key to the conversion is to have all the tools and plenty of space. lol
If you or any other Charade owners are after any further info, feel free to shoot me an email and I'll be more than happy to offer whatever info I have.
lukas86main@gmail.com
Then again, you could turbo that Deto engine if you haven't already. Those things pack a pretty good punch!