Rod change

[zx_volcane]

I'm doing it on mine at the moment. Take the sump off then oil pump then undo the big ends and knock the pistons out and change the rods over. It's pretty easy really.

I'm just struggling getting new big end shells

As I've said prob a couple of times to you already, get to your local engine rebuilders

They'll be friendly and be able to get you exactly what you need, usually at a good price