Go direct to Ian Melville @ specialized engines he built my trackday 1.9 about 2 years ago & it was mint.

It's as easy to fit as a 1.6, but you may find the cam belt a bit tight, & you may have to create a home made oil return pipe (from turbo to block) but thats all. Mines done approx 5000 track miles & has been golden, no oil leaks or any sillyness like that. (plus it looks like a 1.6....)

Good luck