if I give the 800 one more weekend, what size jets and fuel pressure do think I should be running?
Jetting will depend on your combo. I would start with the stock jetting and go from there. You'll need to get the #'s off the choke horn and go to this site for the stock jetting on your carb.
Mor Tec (http://www.mortec.com/carbs.htm)
You should run 7-8psi max at idle with a Holley. Also make sure your running the right power valve, that setup may have a week vacume signal so it important the power valve is opening at the proper time as well.