i just bought a turbo exhaust manifold with a 12a turbo and a dump pipe. still needs lots of work to it but when its done it'l be going on my bb trx and the twin 40 solex will be on the 120y.

A mate of mine bought a 120Y with a worked L20 and 5 speed (?). He said it went hard, but he only bought it for the motor and box that he put into his 200B SSS.

as said before with the 180b xmember is best way 2 go the bonney will fit as i had done same conversion. ps but i had 2 do a few little nips with the grinder. its a good conversion and well worth the fun out in the bush!!
trust me just a set of webbers on a L20b in a 120y is fun enough good luck hope 2 see some photo's of the finished product.

cheers for the response.
i should be able to work it out with the info you provided.
the car is going to be used as a wet weather slider so if comes down to it bonnet can get a hole cut in it.
ive got a 180b 4speed iam gonna use
and a few tail shafts to cut and weld together. should be alot of fun.

there's info on this in the "engines into 1200" section of this website.

however, it doesn't seem to cover all of it.

1) you'll need a 180B crossmember, engine mounts and master cylinder.
2) try and get the control arms and swaybar too.
3) you'll want to upgrade to stanza struts and discs with 200B calipers while you're at it. the springs, from memory, need lowering by 43mm exactly to get them back to std ride height. if you want to go lower, short stroke KONIs are about $400odd a pair for the front. try and adapt the 180B swaybar top the stanza struts. if it doesn't fit, use the 120Y one. i can't remember if i bought it and it did fit, or if it didn't....
4) use the 120Y castor arms. they're shorter than 1200 ones and should fit perfectly.
5) gearbox will be fine in the tunnel. you MAY need a custom gearbox adaptor plate, depending on what gearbox you use.
6) tailshaft will need to have the front yoke changed.
7) be nice with the clutch, or you'll snap the diff like a toothpick.

this is the EASIEST and honestly the CHEAPEST way to fit an L series engine into a 120Y or 1200. not sure on bonnet clearance though with the L20B, but i know the L16/L18 are an easy fit with the 180B crossmember.

i have seen people use a stanza crossmember, but i haven't done it personally so i won't comment on that.

*EDIT* yes it all should bolt up perfectly, and your front track will be increased by about 15mm on each side. no neg camber unfortunately...

im am looking at doing the conversion L20 into a 120y and want to know exactly what is needed.
this is what i think is needed, someone correct me if im wrong.
180B crossmember, ive heard these will go in but do you need to modify anything to make it fit, will i need to re drill the holes in the rails.
can you use the controll arms of a 180b, and so does this give you negative camber.
do you use the 180b engine mounts ?
will the gear box fit in the tunnel and what is needed to mount it?
If anyone can help me out much appreciated.
thanks