Edelbrock E-Street vs Performer RPM Heads

DC Dart said

............But can these E Street be made to flow like trick flow later on? Within reason I guess. Yeah I know define reason right. LOL

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I can state that the E Street/RPM casting, in well ported form, without epoxy or welding can support 780+ horsepower using a 451 stroker and 91 octane pump gas.