I had an hz with a three on the tree.
which i sawpped for a speco 3speed floor shift after the linkages started jamming.
I found the 3 speed much stronger than the 4 speeds as the gears are a lot thicker than the 4 speed when you measure them.
The 3 speed and the 4 speed have the same housing except the 4 speed has to squeeze reverse in the extention housing.