When I rebuilt my engine I made a decision to stay true to the original specs within reason. While I would prefer a more accurate car to start with than the ERA we all do the best we can with what we have. Some like modern stuff, others strive for more original when/where they can within their budget.
For my engine, I chose to stay with iron heads, replaced the roller cam with a flat tappet, kept the Le Mans rods, etc. I DID make a concession with the pistons, 12.5 to 1 just won't cut it with todays pump gas, so I reluctantly went modern with a lower compression ratio. I just hate myself for giving in like that, but my therapist assures me it's "OK".
