tim975
Here is the link to the Optima web site: http://www.optimabatteries.com/ Check out their comments and FAQ section. I would go with the Yellow Deep Cycle battery as I feel it would fit your application.
With that said you need to remember that when plowing or any other activity your alternator "should" be providing all of the necessary electrical power to operate the vehicle. The only time, other than starting the engine, that the battery
2001 Chevy 2500HD, LT, ExtCab, 4X4, DMax/Allison, Lt Pewter Metallic/Lt Grey Int. 90 gal aux tank (auxtank.com), Ranch Hand Frontend replacement and Cowboy rear bumper.<br />Jorden Brake Controller<br />2001 32RK Alpenlite