As most everyone has already stated, these should not look like that.

But...to make you feel better (well, meaning this [censored] happens far too many times to all of us), check out the attached photos...the crud on the side of the guide is the left-over machining junk that the shop left in my factory SB heads.

That was after $1.5K CAD in '99 (so yeah, freaking expensive, but this was a highly recommended racing machine shop in London, ON, Canada - 'Atchison Machine Service').

Good thing I pulled these apart, I was going to try my hand at some serious head porting work...glad I did!