Re: 396/375 cam for street 454?
Nelson can perforn the work but truly ANY quality engine machine shop that has has ever built some BBC engines will be well versed in this procedure.
Unshrouding the valve in this case really, in my mind, doesn't constitute, 'chamber work'. Certainly notching the bore to match the whatever you do to the head ala 'gasketmatching' could only help as Keith mentions...all neatly done. All could be done at home with a die grinder.
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