200TDi in a Petrol 90

Here we go again, more problems!
Now I'm led to belive that the engine mountings on my 1984 petrol will not fit the 200TDi I have comming, anybody know for sure?
I have got a 200TDi exhaust but now I'm told that won't fit on the same mounting points as the petrol exhaust has! Again anybody know for sure? (I have ordered the Steve Parker conversion ppe BTW)