I think I found a Unicorn!

[mgb260]

Richard, The liners in this thread are GM. Maybe in your case someone put your liners in upside down like mentioned early in this thread?

[ag1234]

FWIW , I called Summit today, they say sleeve is .060" wall. Seems too thin ?  How about Hylomar at bottom of liner ?
  Outdide of sleeve might get wet, in some spots.  Onward,  Art.

[ag1234]

A valvetrain revolution is coming.  Fred K., do you see it ?
                                                                                                     Onward,   Art.