[GroundUrMast]

The Winegard HD7000 and it's larger peers, the HD7010 & 7015 will give you excellent coverage of the many OTA signals available to you.

You can reuse the coax, provided it's ends have not been disconnected and left open to the weather. (Once water has entered the coax, it's trash.) The mounting pole is very likely a good location. Most are located on the south side of the home, which is ideal in your situation, the antenna will do best if it has a clear view to the south west, the direction it should point.

If you reuse the satellite system cable, be sure to remove satellite system parts such as diplexers, matrix-switches and amplifiers. Some of those parts may look like common OTA/cable splitters but may not pass OTA TV frequencies.