Strongbad -
The Williams model number is FP-71, I think, and yes it fit two of the holes on the side of the receiver. As this version was color case-hardened, it wasn't going to be easy to drill different holes, so I'm glad it fit. (The holes are quite a ways down on the side of the receiver, works for the FP-71.)
A Lyman 38 would be more "historically accurate", but these are 1)scarce 2)probably only fit original 1895's and 3)harder to adjust.
The way things transpired, I bought a Williams receiver sight and installed it. When I realized the front sight was too low, I started thinking "gunsmith". Then "carbine length" and "recoil pad" were inevitable.
As Williams hadn't furnished the sight as part of the gunsmith work (it was a separate order from Midway, I think), I added the comment about an additional $70 for a "complete" job.
Yes, the .30-06 and metal butt plate were an interesting combination.
As modified, it's a neat little carbine that points well. I hope to get a deer with it.