There are 2 bolts holding the starter to the bell housing...one on top; the other on bottom. The head of one bolt (I think bottom) points towards the rear of the truck and screws into the bell housing. The head of the other bolt (top?) points toward the front. It's screwed in from the opposite side, passes through the bell housing and screws into the threaded hole on the starter mounting.
I discovered this after thinking that one bolt was wrung off and I took apart the starter while still attached by the top bolt. After breaking off the mount housing with a hammer, the top bolt fell onto my chest...haha
oh, wow, thanks! the autozone guide just said "remove the two bolts" ...i'm missing six other bolts right next to the starter so when i didn't see the heads i just assumed something else had gone wrong.