when i did this conversion on my last dub i couldnt find much info and had no end of problems due to using bit and pieces from different engine, i couldnt have my motor off road for more than 2 days, but if u got time i would use just them 2.0 bottom end, find a 2e dizzy as they fit into wiring(as long as its deffo didi ur old lump) if i was to do this again i would use
mk3 2e engine and dizzy
ur pb head including manifold and inlet manifold, and anything else from mk2 u can see
and ur mk 2gearbox
as for breather system at front of engine if u got complete enginge from mk3 use the mk3 rocker cover and plumb it all in that way or just put a piper x breather on the pipe coming from block(as i did no problems there)
as i used mk2 gearbox i used mk 2 uprated clutch( easy enough as u have the whole lot apart anyway)
u need a mk 3 cam belt and new cam belt tensioner
i used a metal head gasket which i believe to have been for the g60??someone else will tell u wot model car it was for but it was three layered metal gasket
while u got it apart and funds allowing i would replace oil pump too
as for putting it together it should all mate up nicely as mine did, just take ur time and double check everything
the 2l bottom end conversion wont give u much more speed but will improve tourque greatly
think thats it hope it helps
rik