BJ and my best friend Bear (2 Viewers)

[Eurasiaoverland]

One other thing I've discovered whilst examining the parts collection is that the H55 to 3B bell housing has the tachometer sensor in it.
Whereas my 1HZ bellhousing has no mounting point for such a sensor. So will need to look at picking up the signal from elsewhere on the 1HDT.

View attachment 3973351

There seem to be lots of solutions out there. This was interesting...
Diesel tachometer adaptor from JRP

The 1HD-T will have the tachometer pickup on the injection pump, but it won't work with the original BJ73 tachometer.

 

[fullthrottle]

The 1HD-T will have the tachometer pickup on the injection pump, but it won't work with the original BJ73 tachometer.

There is probably a solution out there.
This was also interesting...

1HZ injection pump signal to BJ70 tachometer sensor

 

[fullthrottle]

For my records, been doing some measuring of old to new....

The clutch pressure plate is pretty big. I don't have really accurate measuring tools, so gave some tolerance here and there.