That's done.Anyway found myself a list of things to do before Kirton.

C.V. boots
Prop centre bearing
Rear prop uj's
Rear diff front seal
Extend front diff breather
Front upper wishbones

I was looking at the breathers yesterday whilst greasing the truck I have all the bits to extend my ones didnt know there are 2 on the rear diff

Mine only has one on the rear diff,but it is an older truck.Maybe someone else knows better about yours.

they both looked like breathers to me

Mine is on the top left-hand side as ya look at it from the rear of the truck.

The pipe runs up into the tubular crossmember.

yes I have one at the back and one on front of the diff running into the tublar x member like yours

You might be right chef,but mine deffo only has one.