Best Gears for a 408 Stroker?

Hi guys, I have a 408 Stroker in my 72 Swinger. I gave a 489 rear end with 3:73 gears. I’m pushing 3500 RPM at 65mph. Not good! What’s the best gears for both street and freeway? 3:23’s or less? Thanks for the help!

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I merged your two threads.