question 1 what does everyone mean when they say OT is it like some text speak my kids use question 2 would the manifold and turbo from my 2.5 td defender engine fit mt 200tdi discovery replacement engine to save all the exhust mods some say the block/head is the very similar but im sure its not that simple whilst i am being a dork having read the bigger the intercooler the better could i use 2 standard 200tdi linked together to increase capacity