As above in the title, believe that the cover is an SD1 unit. I am using a pump base to permit me to move the oil filter to a remote location in my MGB.
I think the thread is PROBABLY metric and M6 but before I run out and buy a load of bolts and get it wrong 3 times
![Very Happy :D](./images/smilies/icon_biggrin.gif)
Cheers.