[Skip Fix]

I have had good luck with th Edlebrock sets and they look the same and are a little less expensive than others.

I have never used the gear keyways always an offset key. Always worried may get it way off and think it is right.(Did that on a motor rebuild in high school off one whole tooth. Motor fired up but was sure popping !)Even made a 1 degree one with a file and a thicker one. Most of the cams I have had had a slightly "smaller" keyway than most of the offset keys and they needed a slight filing to go in the cam. When putting them in and out I've had one drop down the lip of the pan(the one time I didn't have a shop rag there) and had to fish it out with a magnet when tapping out a really tight one, so I like them to be snug but able to come out with only a slight tap.
I never rely on the "advertized" offset either as they are usually a degree or two off. Just keep that degree wheel handy and check it every time.