tapage-
hd-t H151's have 14 spline clutches, I have no idea about fz H151's, but I expect bad news.
gas f's and h's are 10 spline.
everything else is 21 spline.
you can pry apart your h55, install 1HZ input, and bolt to HD using HZ flywheel and clutch assembly (275mm) or use HD clutch pp, flywheel, and Isuzu disk (300mm)- but all that is 21 spline.
hd-t H151's have 14 spline clutches, I have no idea about fz H151's, but I expect bad news.
gas f's and h's are 10 spline.
everything else is 21 spline.
you can pry apart your h55, install 1HZ input, and bolt to HD using HZ flywheel and clutch assembly (275mm) or use HD clutch pp, flywheel, and Isuzu disk (300mm)- but all that is 21 spline.