u/Few-Fig2370

Im putting a 272 degree schrick cam into my cylinder Head with harder Springs so i have to Take out the old stuff and clean the Head

(Im German so please excuse possible mistakes)

So my Latest extremely necaserry Impulse buy just arrived and After looking at it I have found some Oddities as there are 4 valves missing which is No Problem I was Planning to put in a new valvetrain anyway but what is More concerning is Why are they missing and why is the some Random grey sealing mass all around the cylinder Head I also noticed these weird carvings at every Valve possibly for a very Sharp camshaft?

I would be very happy if anyone was to maybe Tell me what this Head could have been used for or Point out more weird thing

I Paid 150€ btw if anyone is wondering