Well Michael, I ordered that exact set. They are very nice indeed. The bolts required are 1/2 inch diameter 2.75 inch long (if you want to retain the stock bushings, which I did) and the solid chrome bolts were $3.49 each at Ace Hardware (Home Depot and Lowes didn't have any stainless or chrome in that size) - but they are excellent quality. Below are a few observations when adding these risers and replacing the buckhorn bars with flat bars from a 1987 Savage...
1) You need to drill out the metal housings on the stock rubber bushings to accommodate the larger bolts.
2) The flat bars from the '87 don't have holes in them for the nubs on the housings for the electrical switches. You have to drill those.
3) The master cylinder on my '98 has the line connection on the left side whereas the '87 has it on the front (this has been discussed before). I would point out that the risers interfere with it to the point that I may require aftermarket mirrors. It barely manages to fit enough for the levers to be comfortable.
4) Last but not least, if you have Kuryakyn grips installed with the glue provided in the kit, good $%!*@& luck getting your left grip off the old bars undamaged. I'm lucky mine is usable at all. I will say that it took me a long time and a lot of elbow grease to remove that grip. The metal frame of the grip is slightly wrong now, but only slightly. There are a couple of marks from vice-grips too. It's an ugly chore and I even used a strap wrench to help twist that $#^##@% thing.
Final result, well, here's a pic.