i am installing a new stove and chimney. stove in in the basement my problem is i only have 2 and a half foot of clearance outside to get the pipe out and the bracket. when i mark everything up to get the clearance for the dvl pipe inside i am ok but when i go outside i am off my about 5 inches. do them make something i can put on the ceiling to allow me to be closer? my only other option is to dig a box outside about a foot and put blocks around it.