alright buddy... You will have to point the motor to 180 compass heading. You really don't need to adjust for variation because your are off by only a degree or two from the 0 degree line.
Next, you will have to move your motor for AMC 3 @ 87w. This is your closest true south sat. Set your receiver up and USALS the motor to AMC 3 and use TP 12110 H 14025 as an active transponder.
Make sure you have correctly set your dish elevation too (I don't have time to figure this out for you now but if you need to I can do it later)
BTW your neighbor's
DTV dish has nothing to do with your setup.
Let us know if you have more questions..