Well, that photo of the stock doesn't help much as it doesn't show the bottom where the hole for the magazine is which is what I was hoping to see. Based on what I can see I'm guessing it's the older design, not the current production HFP hardware. It would still work for a blind mag setup IF Numrick's has the old blind mag Floorplate and Floorplate spacer to sell you as well. They would be items #73 and #75 in this schematic diagram:
https://www.gunpartscorp.com/gun-man...110-parts-list
Many don't know it, but Savage first came out with a hinged floorplate (HFP) design back in the early 1970's. The design was flawed in that whenever the gun was fired the recoil would open the HFP and dump the remaining contents of the magazine onto the ground. Very few made it out of the factory before they were pulled from production, and those that did make it out were recalled and replaced with a blind or DBM model. As such very few remain in existence, kind of the "Holy Grail" of early Savage 110 magazine hardware. Here's a pic of the original design from a 1972 sales brochure:
Attachment 3922
Up until that time Savage 110 stocks had a hole completely through them for the magazine and a metal floorplate and spacer was used to cover said hole on blind mag models. This floorplate was similar in design to the DBM and HFP bottom metal, though I can't say for certain if the inlets for all three are exactly the same (someone else here might have that info). As such, if you could find such a floorplate and accompanying spacer for a long-action you could use that HFP stock as a blind mag stock.
Here's a pic of the blind mag floorplate:
Attachment 3924