It almost looks like they were machined like that but you can see it is only at the top. I don't really know if that is normal or not but I cant see how that would affect the performance .

 

is it just those 2 guides? i never saw that on guides unless the machinist ''slipped''

 

nevermind...i see in the other post they are all like that

 

how much you want for the pair of heads?

 

There is another thread with more pics this was just to post a close up of the valve guides. They are 4000 OBO

 

That is weird. Never seen it before. Like identical mishaps?

 

I doubt it's a mishap but I sent some pictures to Mondello to get his take on it. I have F series heads on my other cars but you can't tell if there like that with the valve springs on. These heads have never been worked on I know that for sure so my guess is they were like that from the factory but we will see what the man says.

 

OK I just talked to Oldsmobile Specialist Bill at BTR Performance and emailed him a couple of the valve guide photos This was his response. "I would say it was probably a state of the art trick in 1970 that someone did. The guides need to be machined out anyway so it doesn't matter".