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