I've bought myself some zxr400l forks (thanks to lizard821000 ) and also got myself the zxr400l yokes and some gsxr600 k1 front calipers.

I know Rick Oliver sells the conversion kits for the forks to fit the NC30 and the calipers to fit the forks.
And I know I'm going to need a zxr400l front mudguard.

Is there anything else I need for this to work?
I'm thinking I might need new clip-ons and brake lines?
Possibly a new master cylinder?

Anyone who can shed some light please do, I don't want to buy the wrong things :)

You will need new clip-ons and hoses. I'd try to get the GSXR M/C & lever, much better than the VFR or ZXR one.. You may also need to alter the steering stop points on the lower yoke.

Cheers