EGR bypass?

Eliminate the EGR! There is zero benefit to introducing non combustible gases into an engine, performance wise, at any RPM.
It's original intention on the engine was to reintroduce exhaust gases into the combustion chamber to reduce Oxides of Nitrogen(NOx). Carburetors were calibrated leaner because of the EGR so the problem back in the day was if you blocked it off or it stopped working(clogged, bad EGR Valve etc.) and you didn't address the carb's jetting etc. it would ping it's *** off because it was so lean.