Oil pressure sender??

[Jono FD3]

Hi guys, I\'m going to be ordering a pipe to moove the oil pressure sender from on the block to the bulkhead, the reason for this is so I can put a T piece in at the end to run an after market gauge, but I need to know what the size thread is in the block, as I am ordering from deamon tweeks and they need to know what size thread to send me!!!

Can anyone help as I dont realy want to remone the sender untill I get the kit to do the job!! also would I need to earth the sender unit to the bulkhead???

Cheers guys
Jono