i have a nissan z 18 the 8 plug engine in my 120 Y 311 it works really well n i want to install a ct 20 turbo in it. But first i broke the back housing by where the yolk enters {dont know y } i bought another n there is a knocking when it goes into 5 th gear (Y ?) And that gearbox is very hard to get in trinidad so if anyone has any info on alternative boxes or housings thankx i would like to know .The box i have is the short type email me @ liveleft@hotmail.com or post it here

why the fwd i didnt think datsun made a fwd apart from the 100A unless u mean 4wd or i dont know that datsun made a fwd 120y

Hi liveleff, welcome to the Club.

You have a Z18 "Naps Z" eight spark plug engine in your 1974-1978 120Y (body type B210)?

The Z-type engines can use transmissions from L-type engines (510, 610, 710, pickup trucks, etc), they just sit slightly off-level (did I get that right?). You may need to modify the driveshaft, so measure the length of your existing transmission and count the number of splines on the output shaft.