Looking for some tech input or advice. I have an RS1600i which I'm looking to restore and upgrade parts on, one of which is the engine - I dont want to go fully zetec/duratec as I want to retain some of the original look, but want a bit more than the standard set up produces.

Was considering the following engine spec - any thoughts. Looking for something that will be comparable performance wise to my 180bhp RST or better.

RS1600i head - how good does this flow in OE form and would more work be needed
2.0 zetec bottom end - uprated pistons/rods/conrod bolts - are these needed?
Uprated cam - something good top end
twin 45's or would ITB's be better?
Janspeed manifold & exhaust
Light weight flywheel - any recommendations?