who makes these roller rockers?

Now here's the thing. Don't the Harland Sharp rockers come with shafts, hold downs and all?

If you can buy them separately, they it's certainly possible they are H/S, but I did not think you could get them like that.

Also, OP, if you can take a good picture of the under side of the rocker where the pushrod goes, I might can tell you the ratio.