Thanks guys. Here are a few pics of the 416. My smith said no problem making the mount. I told seller I didn't want the scope when I bought it, but no clue why he didn't leave the mounts on. Can't believe they'd be of use to anyone else with the hole spacing being what it was.

https://photos.app.goo.gl/KM8AXSjSBgpBdZAh6
https://photos.app.goo.gl/CNj4mXpFb5eCQJJb6
https://photos.app.goo.gl/k4irVd9pWrV7eJos5