From what I read, the difference is only .002"-.008" or something crazy small like that. Wasn't anything I was too worried about. Just another good thing about These engines requiring zero lash.
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Ended up going with the 224r cam kit from tsp with ls7 lifters and ordered a couple sizes of pushrods. Thanks for all of the input guys, I'll let you know how the install goes next week.
got any hp estimates on that motor