Line honing crank journals

moper said

I think that should be clarified. It's not that it has nothing to do with it, it does have an effect. The tensioner affects the cam timing by reducing the possibility of slack being introduced into the drive side as the chain wears - it reduces cam timing variance over the service life.

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Sorry your incorrect. It's the resistance of the cam and valve train, that keep any slack being introduced into the drive side of the cam chain, in a SBC V8. If the cam was to keep more momentum than the crank at deceleration( try to spin faster than the crank) and effect cam timing then it would be a mute point because your not under power. Also who's to say that the spring in the tensioner would be able to resist that force anyway.....