You should be able to do it. I would recommend the widest blade you can properly tension (for the 9" it will probably be a 3/8" max but you may have to go to 1/4" to get the right tension). You want a wood blade, not a metal blade. 6 TPI (teeth per inch) will probably be the minimum you can find for a 9" saw. More teeth will mean slower cut but less smoothing, but too many will heat up the blade, won't clear the sawdust, let it warp, burn the wood, etc. You will want to smooth the sawn face before gluing, which can be done with a flat sanding block.
Figure out your drift by taking a scrap board with a straight edge and draw a straight line along it about 1" in from the straight edge. Slowly hand cut it along the line until the board is fully across the table. Measure from the board's straight edge to the miter slot (or edge of the table) at both the front and back end of the table. This will give you the "drift" (the direction the blade is really cutting). When you clamp your resaw fence to the table, you want the same angle to get the blade to cut as true as possible. Do not try to hurry the cut as the blade will start to bow, which will mess up the flat cut on the veneer. Do some practice cuts on scrap wood (squared and flattened on two adjoining faces like your veneer stock should be before you start). When you get that working, go for it with the walnut. You will not be the first to use a 9" for resawing.
Thickness depends on the radius of the bend, tightness of the grain, moisture in the wood, etc. How tight is the bend? If it is not real tight (i.e. Shepard's crook for a cane or walking stick), try 1/8" first and see if it bends without stressing the grains to where they separate. adjust as you see fit.
Dittos on the plastic resin glue. Titebond/Elmers PVA will creep (allow the wood to slide after it cures, altho this will work for mild curves not under a lot of stress if you can do it all in a short work time). Do not use Gorilla glue (polyurethane) as it has little lateral strength (worse creep).
Do a practice glue-up (dry fit with no glue) first to make sure you can handle the number of laminations within the work time of the glue. This is critical if you use the PVA glues. If using them, try a practice with scrap (pine or other cheap wood) to make sure you can do it. Cut the pieces long or, as you bend them, the outer pieces will end up too short.
MTCW and good luck. You won't know what you can do unless you try it.
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