Yep, I remember. *I used 3" bolts, and they were cheaper at Ace Hardware. *As for overhang, I didn't really check for dimension. *It clears an 8lb Danforth by several inches and I hope it clear the 13. *To give you another idea, the rear-most bolts for the roller are about 1.5" from the bow.
Using this chart to judge:
http://www.fishing-catalog.com/anchors/dan_standard.htm
I figure I should be fine with any anchor I need. I know my wreck anchor will work as well.
I wanted to keep the overhang as short as possible for leverage reasons.