You can Temporary put the ANT751 above the high point of the roof to test reception.
A Simple J type antenna mount such as a Winegard DS3000 mount can then be used for permenent mount after the Temporary install.
If the ANT751 proves reception Above the high point of the roof.
And the CS2v Complete comes with a J type antenna mount.
Here are some places to buy antennas and etc. ,
http://www.solidsignal.com ,
http://www.amazon.com.