New bevel head!

Hi all. My name is Richard and I’m from Holland. Just finished building a Suzuki GT750 and decided to rebuild my 900 SSD right after it.
In the 80s and early 90s I raced with it and had “fast” camshafts in the heads. I really dont know what type it is, it is stamped P on one of the cams. Is there one of the members with some knowledge of this?
Have a nice weekend,

Cheers Richard.

Or contact this guy

He has stuff for sale at Alphen aan den Rijn. Is that in the next town?