More details please and good documentation.
I'm thinking I may have a broken spring on the left side. I get a little extra tacking noise at about 2500 RPM when engine is hot. It appears to be #3 intake but I have not listened to #3 exhaust with a stethoscope.. need someone to hold the throttle open to right RPM and get under there to listen. Could be worn valve guides allowing the valve to slop around.. but that can be checked once the spring and seal is off. If thats the case; new seals at this time and place, then I'll save up to have the heads done.
Was it exhaust or intake?
How did you determine which cylinder it was before you removed the rocker?
How easy did the rocker come out?
What type of seals do you think would be best?
Pics or video of procedure would be nice. I just picked up the spring compressors and some viton valve stem seals, I'm thinking of replacing the exhaust stem seals on all six sometime soon. I'm getting some oil seeping into my exhaust ports/manifold while car sits for awhile. The oil starts to burn out the exhaust once it gets hot then stops.
Heres a link I started about my issues:
http://forums.pelicanparts.com/911-engine-rebuilding-forum/560591-how-much-oil-crankcase.html
All the best,