A:AnswerYou would only have to move it forward if you configure it to vent internally through the charcoal filter. The extra two inches should not be a problem if you're venting to the outdoors.
A:AnswerI measured out the distance and a rough draft of pipe layout with
Bends for elbows and what have you. Then went to Home Depot and they
supplied me with everything I needed including the foil seam tape
That you most definitely need.