Will a throttle cable stretch over time?

On the Ford Explorers we do a "throttle cable mod" which places nylon tie wraps at the gas pedal end of the cable. The tie wraps take up the space that the cable stretch leaves, ensuring you will once again get WOT. I'm pretty sure that could be done on the A-body as well.

With the gas pedal in it's fully up position reach under and pull the throttle cable towards the rear of the car. If there is a gap, fill it with tie wraps...

On my A-body with a Holley Dominator I had to bend the gas pedal bracket slightly to get it high enough off the floor to give me WOT and that was with a fully adjustable Lokar throttle cable and Jegs, adjustable cable bracket. Sometimes you need to monkey around a bit to get it right...