I now have the standard dry type as shown on page 105 of the 35/36 book. See the photo below of my current air cleaner (that I restored). The old oil bath one I have is not the same as the optional ones shown on page 125 of the 35/36 book. I think it is a later one. In doing some searches I found this one that looks just like the one I removed -
Similar air cleaner on UK eBay
He claims it to be off a 51 Ford. Ring any bells to anyone?
Thanks, John