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There are some nice Crane replacement roller lifters for these blocks. If I went with a hydraulic roller, I wouldn’t even bother with any shelf cams. I spoke with Ken Heard at Oregon Cam grinders recently on behalf of a friend and they have some hydraulic roller grinds that could really take advantage of a set of those head. Even more so if they’re of the CNC variety. And you can send them your old stock core if you don’t care to run a wide LSA. For $159 or so, I can tolerate about anything for a good regrind. Bullet/Ultradyne also shows some good lobe profiles on their master list, too.