Well the L20b is in the 120y, it uses bluebird series 2 crossmember ,radiator, thermo fan and gearbox hydrolic clutch. The motor has twin side draught webers and then through to 2 1/4" pipe with a single muffler. I'm also running 13" steelies.
It's been a major transplant and taken a heck of a long time but I must say I am happy with the result. It's a fun car to drive. I'll post some photos when I figure out how!