Don't worry about the Computer warning on the Buick cams.
Lots of speed equpment is labeled for "off-road use only."
That keeps the EPA & company attorneys satisfied.
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Yep, very few Cam companies grind their own cams. The 204/214 SpeedPro is re-labeled by other companies as their very own, so check specs from several companies for what you're seeking.
As far as I know, only Crane (celebrating their 50-year anniversary) does everything in-house. They grind hundreds of cams sold by other Cam companies.
Crane is the #1 choice among NASCAR race teams, so they remain state-of-the-art. You might want to peruse their selections also.
My best suggestion would be to call one of the great cam techs at Crane, tell him your combo/plans, & get a recommendation.
HTH