The following is a , if it works it works , if not well then it's not.
For reception of KSBW VHF channel 8 install a Winegard YA1713 VHF high band antenna , channels 7 thru 13 , aimed at about 130 degree magnetic compass direction.
Install a
http://www.kitztech.com , KT-200 amplifier.
Here is how to aim antennas ,
http://www.kyes.com/antenna/pointing/pointing.html.
Reverse engineering your location to within a few buildings , the tvfool radar report shows that going higher then 40 feet antenna height for reception of KSBW Channel 8 , has the effect of less signal strength.
Tvfool shows the reception path of KSBW channel 8 as being a 2 edge path , 2 or more hills in the direction of reception.
2 or more edge paths often have the effect of bending the signal a little downward.
Try lowering the antenna height from 40 feet to about 25 feet antenna height or even on down to about 10 feet antenna height. I think signal strength will improve.
However be mindful trees and buildings and other obstructions reducing or blocking reception at the lower antenna heights.