Quote:
Originally Posted by steve25
Those are not stock guide tops, they have been cut for positive seals.
As posted its hard to tell by a photo if they have been cut to work with .500" or .530" seals.
I would use Comp Cams 518-16 seals if your guide OD is .530", or 517-16 if they are .500" in OD.
With either of these seals ditch the factory O rings in the trash!
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O rings? Didn’t realize there was an O ring as well. I’m passing these heads onto a buddy of mine and our intent is to just swap them onto the 400 he has (currently has mismatched heads, a 5C and a 6X). So since these have low use and will bump the compression up a bit we were going to put new valve seals and just swap over the valve springs from the current heads and get it running again. Are we missing something?