80 & 85 mph speed limits

Wait, a 305 with a 268* in a 72 Sebring, to cruise at 80 plus mph?I'm hooked;what's the rest of the story?

BTW, You gotta kick out the caster to the max for that, and then fix the bumpsteer, plus the biggest T-bars springs,and anti-sway bars. Not to mention appropriate tires and shocks. But Ima guessing that you're on top of that, already.
And don't leave home without earplugs.