Which heads?

You are right, ratrod, in that motors are air pumps. However, power bands and torque cannot be ignored in a family cruiser. Power bands of 3000-7000 require headers, 3500 stall converters, 4.11 gears.. etc. I've been down that road, and it leads to nice E.T slips. But this car is a quiet ride that cruises 60 mph all day and idles at 600 rpm's. I would like to touch high 13's without sacrificing the driving of this car and without spending hardly any money, and I mean next to no money. I've had 318's go fast but not in the way I'm trying now. I'm guessing (?????) that I must be in mid to lower 15's with the 4bbl. I need a little better than a full second to be knocking at the door.