The Rc30 will push 8ft blade with not much trouble. Keep in mind the rc30 is a little light in the tail. If the blade is 700-800lbs you will really benefit from a counter weight. I am running a Boss Bx-8 box blade this year. It weighs around 850 plus another 150 or so for my mini to full size quick attach coupler. All together it about 1000 lbs. it will lift it with no hesitation off idle, but it is begging for a 3-400lbs counter weight. Mine is a 2012 pt30.