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Tim - salute you for posting the numbers.
Katech is likely conservative from their reliable track background along with the cam being easy enough on the valve train to be rated for OEM valve springs - so with your uprated valvetrain will likely last a GM durability cycle...unlike probably all the other 'big' cams available.
Got to do a video of it at 7000 rpm - the soundtrack of these cars (with the OEM exhaust) is just one more impressive attribute to Chevy's package.
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