an easy thing to try w/800 is the highest and lowest PV's.
2.5" PV to keep it lean at launch 1700-2000.
if that is a bad idea then 10.5"
dont be afraid to try leaner jets than stock too! especially in the rear.
The 3310 has the same 1 3/8 venturi and 1 11/16 throttle as the 800! it is just rated 50 cfm less due to VS! plus it was 10:1 pig rich in HRM. so i can't get excited about it
just set the secondary to only open halfway on the 800 for less cfm
then it is much like a 750
Try #83 rear jet instead of #85, if that is what the 800 has now.