Don't know whats going on in this thread, but what sucks is that you don't know what kind of wood you got. The wood type can definitely effect dimensions. It might not even be bow wood worthy. That said, if I was going for 45#, using hickory, and my length was around 74" nock to nock, then I would go 1" wide and 13/16" to 7/8" thick at center. 7/8" would be playing it safe, but those dimensions can easily give you 60 to 70 lbs as well. I just use a straight pyramid taper for this weight. And of course 1/2" at the tips.