well,i've been wrong before,but in the early 1990's arthur jackson from the road & rally centre acquired an lz16 formula pacific motor,which he wanted a lot of money for,i can't remember how much.eventually he sold the head to a sports sedan driver from victoria,& could not sell the bottom end.i remember him saying it was going onto an l20b bottom end & going into a 1600.i even have a vague recollection of him saying he sold it to robert thompson.maybe that engine was sold on to somebody else.i simply assumed this was that engine.
you can call arthur jackson via stewart wilkins rallying here in sydney,though arthur threw out a lot of stuff a couple of years ago when he moved from one factory to another.he even had an fj24 motor,though someone eventually bought that,after 3 years of umming & ahhing.