> whats required to hook up the disc brakes?
When you put the 200B struts in there, bolt the disc brakes on too. Then all you need is an appropriate brake hose one end which fits the 1200 hard line and the other end fits the 200B calipers. That's all it takes, no booster is needed.
> why not put the L20b in too! Has anyone got helpful hints and tips on crossmembers to use and any tunnel mods required.
See
L. If you select the right L-series sump it is relatively easy. Use the 1200 engine crossmember with two simple flat plates welded on at the same angle as the L-series plates. If you use the right L-series gearbox, tunnel mod is to cut off the rear gearbox crossmember mounting bosses and bolt crossmember to the floor pan.
> Is it easy to get mod plate for this [L20B] set up in Queensland?
So I hear it just takes some time and a little money and some hard work.