I would just go ahead and put 850's on it if I had to have the extra cfm's. I don't know the size of your engine,but if not to big the 750's DP with the airhorns milled off,PV plugged and sq jetted @ 80 will work great.Set your idle screws @ 3/4 turn's and adjust your idle speed to that.
Hope this helps and saves you a little $$$.