I can tell you from a conversation I had with one of the Herbert techs, all of the flat tappet cams are Mfgr'ed by Crane cams for Herbert, you pick from whats offered in Herberts catalog, the prices are very good if they have what your looking for, I inquired about a lobe sep change for a solid flat tappet, no dice.
The rollers on the other hand I believe they grind themselves, they mention a cnc Okuma-Howa cam grinder in their catalog.
i have never ran one in a BBF but,i did run a chet herbert roller cam in a SBF 351. the springs, keepers, retainers, lifters, pushrods and cam all came from herbert,about every 6-9 months it would wipe out a roller and take out the cam,which is BAD,But i would call them and they would warranty it out every time. on cam # 4 they sent me a new cam and lifters and CHET himself got on the phone and told me ''TO NEVER CALL THEM AGAIN'' not that i was going to anyway, this was back in the early 90's so maybe they changed..maybe not.. good luck TRENT
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