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Old 09-29-2010, 10:59 PM   #1
dwcsr
Hollister Road Co.
 
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Join Date: Apr 2005
Location: Houston
Posts: 6,131
4.8 to 5.3 conversion cam question

I have a 4.8 I'm making a 5.3. I have the floating pin flat top pistons, 862 heads and a cam with .467/.479 lift from an LS1. The stock lift is .457/.466.

The questions I have are do I need to use other than the stock 862 valve springs and do I need to be worried about the piston hitting the valve with the flat tops.

My thinking was its almost stock and should be no issue but I'm not up on LSx motors
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