Hello all, New to this great site,

Anyway have been out of the ford scene for a long while now, previously had a couple of gls saphs and a 330 2wd saph cos,

My plan is to build a full 3door replica using engine,box,running gear etc from 2wd saph, based on an 83 xr4 shell, reason being I live in Ireland and import duty on anything under 30 is crazy. Before I comment to this just have a couple of questions, many thanks in advance.
Will i need to widen the tunnel? (if so i don't mind)
Is the cosworth shell stronger, Will i need to strengthen it? and does it have extra mounting points? Will everything bolt in?
Will finding back quarter windows rubbers be hard?
And of-course bumpers,tail, vented bonnet will they be hard source?
Thanks again