Youtube videos dyno 318 magnum stock vs cam upgrade

Interesting the got 233 RWHP when that engine is only rated 230-ish net HP from the factory.

I'm pretty sure RWHP wasn't the rating method used during those years.

If someone can prove otherwise.....

I could see headers, free flowing duals, 4bbl and airgap intake, better tune, probably accessories on the dart take less hp make up for the probably 50-60 hp drivetrain loss.