Help required for a bolt size/part number please

Hi,

I have fitted a 110 side frame to my 69 Station Wagon. There are a few differences and one is that the fastening to the cross piece that forms the back of the seat box are threaded holes in the B post.

Could anyone tell me the size or part number of the 4 bolts needed (see pic)?

Thanks for your help.
Cheers

99% chance it'll either be M6 or M8, so just try one of each and see.

Cheers I'll give it a try - all my bolts are imperial!!

Does this help? https://www.landroverworkshop.com/diagrams/body-chassis/body/rear-body-lower-toe-panel_52719

If it's a '69, then it could quite easily be either 1/4 UNC or 5/16 UNC, as I doubt them being 1/4 BSF or 5/16 BSF, as UNC seems to have been used more or less as standard throughout the Series models.
However, if you've got some, try them!