Cant see how on earth its a bitch to do .... front panel wings and scuttle are piece of piss, rear panel a little harder, but can be done, need a couple of rectanguler holes in rear quarters for bumper end caps thats it externally

Re dash mounts, thats easy enough to get round, espescially form mk4->Mk3.... harder the other way round as you need the brackets for blower ducting...

I know other things are different such as door catches and the check strap bolt blah blah but so what, visually they will be identical...