Don't forget to grab the G40 rear axle if you can. I know they have an anti-roll bar built in and I'm not sure what difference they make on their own - I fitted mine at the same time as a whole load of other stuff.
In addition to the other stuff people have mentioned, the rev counter won't work without a bit of tinkering. I can't remember exactly what I did to get mine going... it was about 9 years since my conversion. I think Mark Hunter (confusionhunter) may have given me advice on how to get it working. From what I vaguely remember, you need to run a pair of wires from the terminals on the top of the coil to the rev counter. You also need to disasemble the speedo and remove the L shapped circuit from behind it, otherwise the rev counter keeps setting off the oil pressure light and buzzer. This means you won't have any kind of oil pressure warning, but I've just fitted an aftermarket setup now.
As for the servo, I've got a Lockheed remote servo - I've seen these kicking around on eBay for around £150 new. It needs a bit of creative thinking to get it working properly. It went straight over my head... I ended up getting someone to fit it for me.
Stich weld the chassis leg whilst the engine is out. A few people have mentioned to me in the past that the Mk2's were better built and hopefully shouldn't need it doing. I noticed a split starting to develop where the chassis leg runs through the bulkhead which needed a bit of attention about 7 years ago. It's been solid since then
If you've got any questions, give me a shout and I'll try my best to help.
Pic below - you can see where I've cut the slam panel to make a removable section for when I need to get the 'charger out. You can also see the servo at the back of the engine bay on the nearside.