Ok so I have a 69 dart gt factory floor shift, the car has power steering and i was wondering if I could simply change to a manual steering box and if anything would be effected in the column. Any help would be great. Thanks.

Yes. The manual column is longer than the PS column, so you need to swap steering shafts or buy an adapter to make your PS shaft longer.

any idea on where to buy an adapter? im building my first car and my parents cars are both originally manual steering so i thought id ask around. Thanks.

Not cheap for what it is...

http://www.firmfeel.com/column_adapt.htm

haha not gonna happen on my budget. sure i could save but then im that much farther from the 340 sittin in my garage...hmm power steering it is for now. Thanks ill make sure to save the link so when i can afford it.

Some folks drill out the plastic pins that hold the steering shaft together and extend the shaft to make the power steering shaft longer. The pins exist for safety reasons so this is not the answer. You might look around for a used manual steering shaft - sometimes they are cheap or someone may want to go power steering and swap you.