Jerry, I agree, no way I'd do it w/o cases being bare.
My SE251s are '07 cams. All related parts are '07. They were cut down and a hard race pressed on to fit the smaller early inner cam bearings. However, I did not personally do this, and I no longer have access to the shop that did.
John, yours were done on a lathe? Any hints on tooling and feed rate? [no machinist here, dumb tin banger]. I've looked for races, no luck. Would you have a source?
HD Street, simple as looking in a bearing catalog at inner races for the cam bearing [assuming they are a std bearing].
How much press?
This make it easier for everyone and would allow all grinds.
Andrews and Wood have conversion cams, but neither offers every one of their grinds as such. Anyone else add to that list? I want to remember SE offering them some years ago to fit all '07 parts, not what they offer now. I may be wrong on that.....
Dave