I know in real life I need to either use malted barley or add enzymes. Assume 100% conversion.
The next part of alcohol I'm pulling for this thread on the forum:
http://adiforums.com/index.php?showtopic=5579&hl=%2Blb+%2Bof+%2Bcorn+%2Bto+%2Bproof+%2Bgallon#entry31802
56 lbs of corn makes 2.91 gallons of 200 proof alcohol
56 lbs of corn makes 5.82 gallons of 100 proof alcohol
Due to lack of efficiency, cuts, life, etc I'm guestimating one can get 4 proof gallons per 56 lbs of yellow corn