hmm, somewhat encouraging. Thank you! So hopefully it can bolt on.
Looking at 'tojo 4wd'shop, oil filter mount gaskets, the oil return hole into the block is larger on the older 2h, which makes sense.
Guessing, ( I know one shouldn't), perhaps the oil pressure was set slightly higher on the pre '84 2h engines. As there is more than likely some pressure drop when the spinner kicks in. Hopefully not much, as it looks little in scale and very direct location access to the filter.
I wonder why someone would take it off?! Besides extra time cleaning it, some extra noise when spinning, possible leaks if o'rings are not kept in check. Perhaps the unit fails, although being a simple mechanism.
We should all want cleaner engine oil, all the time.
This design application and location seems much more straight forward than installing a newer aftermarket centrifuge oil cleaner.
The newer ones such as the spinner II appear to be a bit of pain to install on the 2h as the return oil requires to enter at the sump.
Does anyone think the dip stick hole could be modified?
Another possible option I wonder about is using a 'jackmaster' oil bypass sandwich adapter which fits onto the original 2h oil filter mount and gives three new ports to access oil. One would require an electric pump to operate the spinner, but it would be neater than butchering the sump. Although, as far as I can see, aftermarket oil bypass manufacturers recommend return oil to go to the sump.
Any thoughts?