Lol thanks for the kind words
Deniz, "how hard is it" depends on who's doing it. I mean if you don't know shit about nothing then it's impossible, if you've done something like this several times, it's easy. For me it's not what you can call easy as it's the first time to do a engine swap like this, but i have my dreams and i'd also say skills and opportunity to do it, so i'm giving everything to get it done
If you can't do it yourself, you have to have friends who can

I'm tending to be that one guy who has to help my friends to get things done, so i wouldn't also say it's very hard to do this swap.. difficult yeah but not hard
Some facts about this kind of swap:
* engine is too wide, you have to cut the body quite alot
* 850 wheel track is wider about 100mm, which also means longer driveshafts, which means you have to make the subframe wider, which needs some good welding skills
* for spindles from 850 you need also ball-joints from 850, which you have to attach to 400 control arms
* tie rods too short
* steering rack doesn't fit, i changed the positsion of it just a bit(went a bit lower)
* with 850 spindles you're getting 4x108 or rather 5x108 pcd, but it's possible to put 5x108 also for rear wheels using bearing from 850.. the inner diameter SHOULD be the same with 400 diameter so then you just have to deal with the brake system
These are just some of the problems, as you see i'm not finished with my swap so i still don't know everything that might not fit