For the time, money and hassel, why not put a 2.0 litre bottom end in, clean up/re-build your cylinder head, upgrade the camshaft to 267 degree cam, improve the induction and exhuast system, would cost about the same and you could see simular bhp to the 16v engine with more tourque.
A few people have done this on this forum, and there's a lot of information out there on the internet just waiting to be used.
I'm in the process of sorting my 8v out and am still tempted to up the power, but I have also gone and got a 16v now so I'll see how I feel.
