Real dumb newbie 440 questions

They BOTH have no heater blowers installed.

Is this a limitation of having the 440? you can have stock blower motors and still fit a 440 in the car. depends on the valve covers really.

Are there drawbacks to having headers that go thru the fender wells versus not? only limitation would be tire size up front and turning radius

What should I look for when looking at 440 A bodies? Any issues to watch out for? its a bolt in deal. biggest decision is headders.

Lastly, how much extra $$$ should a 440 in an a-body bring? are you starting with a slant 6 car? if so the price difference will be very slight compared to a small block.