'74 Scamp A904 issues

PScamp74 said
I see, after removing the valve body, that it's not so bad..
I also see that my question above about the possible worn piece inside there is just a brake or something, normal I suppose? Moving on with seal changes... thanks for everything so far y'all...

I see no abnormal wear in the pictures. The two areas I think you are referring to, circled in blue below, are not wear or damage, but just rough machining from manufacturing. Those spots do not have anything rubbing on them or wearing against them.
LoRev Band.JPG