Today I sent my fuel rail to Road and Track so they can bore it out.
I also decided that I'll get an Exedy heavy duty button clutch, to handle the power increase.
The only thing holding up progress at the moment is the cylinder head (which is having the shim and bucket setup changed, with the new cams and springs being fitted). It is expected to be ready this week some time, then everything else should happen fairly fast after that hopefully!