Many people will say GO with the delete.

I say don't.

WHY? My short block was done by an SCCA engine builder. His rationale was simple: The small Hp gain for the delete of rotating mass wasn't enough to offset keeping the engine smooth.

The alternative is go ahead with the delete, but have the engine balanced. Fair chunk of change there! Nevermind the pain in the ass screwing with bits and pieces for the delete...