Big Block valvetrain issue advice needed

Built this engine early 90's. Might be 1000 miles on it.

383 .60 over, 11:1 SC, open chamber heads, geardrive, Crane [email protected] X 540 solid lift cam.
108*. 1.5 cast rocker adjustable setup, ball/cup crane push rods. 3500 stall 4.10 gears

Last fall did a test run in industrial park, 100 shot nitrous 5500RPM.
Did many times prior, no engine miss, or valve float, actually ran good.

Fairly loud exhaust so couldnt hear then.
Went to start yesterday and noticed excessive valvetrain clacking passengerside bank.
So adjusted valves .019 as recommended. They were not far off at all, onlyadjusted
a couple. But #8 intake had more lash. After adjusting put valve cover on started and no
quieter at all.
Took off rocker assembly to investigate. Oil to all parts,Push rods all straight, rockers,springs seem fine
except #8 intake rocker wear (see photos) and #8 exhaust valve wear??

Before I proceed wanted some input on possible problem? Bent valve? Valve guide?
Also engine runs good no misses as is???

Thanks, Dave