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I've wondered the same thing. I've seen different figures on Sallee Chevrolet's site, so I don't know who to believe. Somebody says lift is .410/.425, another says .423/.423. Duration figures also vary, one says 202*/207*, the other says 190*/195*, both say LSA is 115*, then another quotes the RamJet cam specs, which are somewhere in between, but with more lift. Confused? Me too.

The 202/207 sounds a bit much for a truck motor, since the LT1 cam is right at that, but with quite a bit more lift.
 
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