Another thing while I'm here:
I'm running at about 2700 rpm's at 40mph. Why in God's name are they so high?

it's a Chrysler 440 with a 750 edelbrock carb, performer rpm intake, headers, 3.23 rearend, 14" wheels, and fairly beefy cam. But i'm sure i shouldn't be running that high. Any tips on adjusting and tuning? Or what could be contributing to it?