No, the longer stroke WILL NOT make "more torque", if the CID is equal and the cyl fill and compression are equal. And I not only CAN prove it, I WILL.
Torque = piston force x stroke
Piston force = cyl pressure x piston area
Therefore, torque == piston area x cyl pressure x stroke
Cyl pressure varies over time during the course of an engine cycle; but basically, once the ignition timing is optimized, it's primarily proportional to the % of cyl fill (induction system effectiveness) and the compression ratio.
So, take the torque equation and rearrange the terms.
Torque = piston area x stroke x cyl pressure
Now, what is piston area x stroke?
Right: CID. Doesn't matter which way you mulitply those together, like which one is large and which one is small, you still come out with CID.
Now in the real world, the relationship of bore to stroke changes some other things, and therefore disturbs the "all else is equal" assumptions; for example, the inertia of the parts determines the RPMs at which torque begins to fall off, a small bore (long stroke for a given CID) can affect cyl fill by allowing (or not) larger valves, etc. But, to the extent that those factors can be ignored, torque is proportional to CID and compression, assuming equal induction system efficiency. The lower the RPM range in question (i.e. the less the effect of the inertia of the parts), and the more restrictive other parts of the induction system are compared to the valve diameter, the less effect the bore/stroke ratio has on torque output.
Note that the casting foundry does not appear in any of the equations anywhere. The gasoline does not release energy during combustion, and thereby create cyl pressure, in any kind of response to the casting brand, or to the casting owner's fondness or preference for that brand. It's very dumb that way.
In practice, induction system efficiency (also known as "volumetric efficiency", such as is used in the "carb size" equation) also isn't too much a function of cast iron brand, for stock street motors of similar design and purpose (say, a 75 Olds 455 in a 98 vs a 74 Chevy 454 in a Caprice vs a 76 Frod 460 in a truck). Therefore the torque of those motors isn't much different either. Not usually more than 5% or so, in stock trim, or if similarly modified (similar cam profiles, similar exhaust, etc.) but not too far from stock.