After doing a bit of research, Castrol or any other coy make moly extreme pressure grease for CV joints, Redline make CV2 grease which is red moly and
synthetic with good feedback, which I will use.
I am going through the process of changing my inner plunge joints to Porsche 930 108mm joints as the previous ball and cage joint had the circlip in the wrong place so I thought I had better find a good grease for racing use, one positive all my chromemoly CV's have small boots on them now so less chance of coming off.