Livernois builds some great stuff but I believe for what Bill is looking for ERL is a better match. They build the blocks for all three of the Ohio boys but Kurt Urban assembles the blocks for two of the three, ERL assembles turleys engines. If we were talking about a higher performance build (and higher costs) I would recomend Kurt Urban (did my engine) over Livernois.
I wouldnt piss on anything outfits like scoggin-DICKy or texas speed sold.
The wiesco piston-ring pack that ERL uses is what is in my car today. I have never had an engine that had less blow-by
All just my opinion though