Right good news and bad news.
Good news is that they are fitted.
It look a little bit of filling down of the biting points and some heat (kind of).
38.5mm ball joints were a little too big for 37.8mm holes.
Plus the Nissan holes were NOT round, they were weirdly oval-ish by a few point of a mm.
Anyways after some heat and filling I've been able to push them on with a big ass vice.
However, the heat totally melted one of the rubber boots, so now I'm kind of back to square one.
If anyone has some links to spare rubber boots, would be helpful as ebay has just got crap on it.
Getting the joints in.
However as mentioned, the boot just broke down and fell apart due to the heat.
One side
The other side without a boot
I just need to find a replacement boot now ffs!