Ok from what I can gather the Winchester 840, 370, 37a, and the Cooey 84 are all the same firearm. Is this correct?
They are pretty much the same but there are some differences. As mentioned earlier, the forearms are different and some had different attaching mechanisms to the barrel lug. That is the biggest difference as far as parts fitting . Quality wise, the 84 had a steel receiver, steel forearm spacer, steel trigger guard and walnut wood. Starting with the 840, the receivers became stamped alloy, plastic forearm spacer and trigger guard and hardwood stock.
But as far as butt stocks go I think they are identical. I don't think the OP was looking for a whole wood set.



























