[billjam]

Originally Posted by proffighter

Bill

You're right, with 930 cams you need a spacer, as thick as housing before.

I have 964 cams, they have the same layout as SC cams. So I needed a thin spacer, maybe 3mm (can't remember exactly). I think with SC cams you'll need a spacer too, in cause of the length of the pump shaft as I wrote above

Correct.
When I fitted my cams, I found the pump shaft was only about 1mm too long so I ground 2mm off the end of the shaft to give me 1mm clearance.
The potential interference between end of pump shaft and end of camshaft is an important point to watch for when bolting up the scavenge pump.