LS2 or Rollmaster Timing Chain
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If upgrading to a LS2 chain on a High mileage LS1 motor, it would be best to replace crank and cam sprocket, while replacing chain.
So are the cam and crank sprockets (part #) & size ect the same from LS1-LS2???
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but if you must opt for the sprockets i am unswure if the crank snout has the same diameter i am sure it does but i wouldnt replace it to be on the safe side, and besides the sprockets dont have any porblems with them to begin with, atleast i would hope not 

