Lets have some fun here! Here is a link to a wiring load chart:
http://www.windsun.com/Hardware/Wire_Table.htmGo to the 12v table. At my first time using it, I thought it was wrong. It is showing the voltage drop of 5%, at 10% is what the Docs say is fine. Than double the distance, which is at the top of that page. The breaker is rated 35amps, I could not find a amps rating on the motor. But I will use 25amps which is a fair number.
#8 is good up to 44ft total run back & forth
#6 to 66ft
#4 to 100ft
Your run should be in the 55 to 60ft range. Now if that motor pulls more amps, you are not going to get the 175lb of pull. The voltage is going to drop, but it will run the windlass and you run the risk of burning it out due to the drop.
I am using my V700 with a 7lb anchor & 30' of chain on a V258 with #8 wire. A little different than your setup. I think Mr. aguyindallas is right, but thats just me. "thats all folks" & good luck with the install!