Surely you could pick up a cheap reliable gt over there?
Mines worked out at £2,600 or €3,500.
Its not mint but its not a pile either. the only thing wrong with it was a scrape on the back bumper which still has to be resprayed.
I used to know a lad here who done a bolt on turbo conversion(dont know the details apart from boosting .5bar) , within 2 weeks the car blew up.
No offence but it doesnt seem that you'd be able to do it safely.you'd have to remove a lot of key parts of the car and if you missed one small thing it could put lives at risk.
Same with the engine conversion aswell, and i doubt you have a lift for an engine?
Id say just save for a ep82 or 91.
i know it was said already but i just thought id back it up with why