OK... The results are in!
The box with my rails and sissybar came in today while I was home for lunch and I was able to snap a few pictures.
It looks like I will be able to mount the sissybar on my Savage, without drilling any new holes. The two front bolts from the S40 are way too long for the Savage rails, by at least a good 1/2" or so...
Here are some pictures (although crappy), so you can get an idea:
Here is the stock S40 fender and the Savage rails
Here's the back side of the rail, notice there are 3 holes there, the front 2 use the bolt and nut, the 3rd one back uses just the bolt - all of which came off the S40.
Here is a side shot of the sissybar. There are 2 holes in the rails of the bar that will need to have bolts put in them. THe bottom of those holes lines up with the hole in the rear of the fender - this is the same spot on the S40 rail that was a little "nipple" that stuck in - as I've stated, almost like a placeholder.
The top bolt sticks out at the top of the fender, as seen below.
Sooo... It looks like it will work, without drilling ANY new holes. Also, the stock S40 turn signals do fit on the Savage rails. I know one of the old threads that was linked said the differences were having the screws flush mounted (Savage) or mounted on the top (S40) - The signals fit in and the screws fit and hold it just fine.
I need to hit the hardware store after work today to get a couple shorter bolts, but it'll be going on as soon as I'm back from that. Work can't be over soon enough!