<VV> Valve stem seals

[Jim McLott]

Yeah, I found these mystery pieces littering the oil pan and oil pick-up screen the last time I took the engine out of Christine.  I forget where I looked it up (maybe here on VV), but that was the answer I got, too.
 
Now for my two questions.  One, what might possibly go wrong if I just replaced the valve stem seals and didn't do anything else, like replace the valve guides, too?  Christine "only" has 80,000 miles showing on the odometer, but that could be 180,000 for all I know.  I really, really, really don't want to have to pull the cylinder heads if I can avoid it.  Should I just leave well enough alone?
 
Two, in his excellent book, The Classic Corvair, Bob Helt speciffically does NOT recommend Teflon valve stem seals "because it may seal too well."  At the risk of starting a hot-adjust/cold-adjust war, what do other people on this list think about this?  
 
Thanks in advance,
Jim McLott & Christine
Member: CORSA, Corvair Atlanta and Group Red (again!)
 
http://www.wittelaw.com/personal/groupred/mclott.htm
 

________________________________

From: virtualvairs-bounces at corvair.org on behalf of Shaun
Sent: Sun 2/5/2006 2:59 AM
To: J R Read_HML; Sethracer at aol.com; Ktbug401 at aol.com; virtualvairs at corvair.org
Subject: Re: <VV> adjusting 68 coupe valves 95hp



The chunk of 'bakelite' is a petrified piece of a rubber intake valve seal. 

yea, Vairily ... Shaun