Not to put down your recipe or anything but I don't see how this could possibly taste like Drop Top. Your recipe looks like a classic American Pale Ale. Drop top is a Amber with totally different ingredients.
If you want to make a Drop Top clone you should use what Widmer uses in the recipe and tweak the amounts.
from their web site:
alcohol by volume
PALE, CARAMEL 10L,
EXTRA SPECIAL, HONEY MALT