so basically i wont find a 6 cylinder L20 very easy, and if i do it wont be cheap in AUS. 6 cylinder would be good but that would be pretty heavy wouldnt it?

need to work out a gearbox crossmember, although i think later model 120ys have mounting points further back for the L series

all you need to do for the clutch is get the master out of a 200b, the template for the clutch is already on the inside of the firewall, but will need to move the brake line splitter

the L20B is nothing more than the normal 4cyl L20 found in 200B and Bluebird. Dodgemean is just being pedantic, as he likes to do with any diff topic that comes up. The 6cyl L20A, to be perfectly accurate, was never released here, so its perfectly normal for people to just refer to the 4cyl L20B as a plain old L20. In fact if you walk into a Nissan parts department and ask for an L20 piston, I guarantee you will get a 4cyl L20B piston, not an 6cyl L20A piston.

i have never heard of a L20b. what are they out of? is it an import or from the SSS? also what will i need to do about the tail shaft

You will find that the L20B will fit much easier than the L20, which is a six cylinder engine.

what is needed for this convertion? apart fron L20, gear box, 180b cross member, hydrolic clutch. tail shaft???
will the diff be ok?