Well Zachary, you really stepped in it now! Once you have sausage making stuck to the bottom of your shoe, be prepared to track that around for a while! :p Please be sure to take lots of photos and post your adventures!
Here is a link to the thread that was (is) my favorite Italian sausage I have ever had.
http://www.smokingmeatforums.com/t/133235/italian-sausage-calculator
[@tulsajeff Since the recent site upgrade this XL file in the thread is not working]
I have the XL file on my computer and here is the recipe calculated at 7# of pork butt. You can plug in the math to a new document easily enough with these ratios:
Pork Butt 7.00 lb.
Fat 1.00 lb.
Total Weight Of Sausage 8.00 lb.
Kosher Salt 3.00 TBS
Cracked Fennel 7.00 TBS
Black Pepper 2.00 TBS
Ice Water 5.95 fl oz
Parsley 2.00 tsp
Paprika 1.00 tsp
Anyone that has tried it has complimented on how good it is. It was easy too. I was blown away at how much fennel it called for when I made it. But like many around here will tell you, good Italian sausage takes a LOT of fennel. Oh... and make sure you get some FRESH fennel seed.
Even if you don't stuff it in casings it is excellent to have around for other things like pizza, lasagna, spaghetti, etc.
<Edit: You can add some red pepper flake and/or cayenne to this if you want HOT.>