hi chuck, welcome. you do know that you can reduce a green stave to close to floor tiller dimensions and with careful drying, you can be shooting in a month or so?
you have lots of design options for a white wood stave. only a few types of wood dictate a preferred design.
pyramid designs lend themselves to board bows, or at least staves with flatter backs.
one of those staves would be just right for a ALB, and those look like some nice one too. personally, I would start with the straightest and knot free, maybe even a bend in the handle? especially if you can find more staves like it without too much trouble.
poundage should be chosen for your shooting pleasure and width adjusted accordingly. If you have 68" to work with that sound doable. How heavy a bow have you been shooting. Are you pre-decided on a handled bow?