LA small block,Do you put an oil passage in your head stud?

OM Mopar,

I pointed this out to you very early in this thread that machining/cutting a groove or notch in a bolt weakens it. It weakens it because the grain structure has been interrupted. A fastener with a necked down [ reduced shank ] is a different animal as the grain flow [ & hence strength of the fastener ] is not interrupted.
Nobody is having a go at you, certainly not me, just trying to point out that the method you are using to obtain a gap for oil flow is not the best way of doing it....