Chris,
Do you really think that you need the entire engine rebuilt? I would think that the entire bottom end would be ok and all you had to do was replace the valve train assembly to what ever you decide. If it's running good dispite the valve train problem the bottom end should be good. I guess you just want to be sure but I would bet that every thing on the bottom end is ok. Hope all works out for you, I'm going through driving withdrawls at the moment until I get my leaky head problem solved.
good luck, just my .02
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