Personally I would'nt bother with the 1600, unless money is seriously tight and you have been given it for free.
I would go for the 2litre pinto, its easier and cheaper to tune if you want to and just as cheap to buy.
As for fitting I'm no expert on mk2's but I would think you will need a world cup x member for starters. There's plenty of suppliers out there that will sell you everything you need for this conversion, I would try
Escort Tec - 07733280190
GS Escorts - 01514228333