Update on the Z71 w/ pics

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Apr 11, 2005 | 11:26 PM

#21

F8L Z71

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12 Second Truck Club

Joined: Feb 2002

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From: Sacramento, CA

Quote:

Originally Posted by 04sierra

F8L, what size valves are you running in those heads? Just curious as to what the biggest you can go before you have problems with the small bore of the 5.3.

They are a 2.02 intake. I can't remember the exhaust valve size. I've had these heads for like 3yrs. LOL

I was told by the machine shop that it would be fine and that it won't create any problems but it is borderline. We'll have to wait and see. I'm more concerned with Piston to Valve clearance with these milled heads, flat top pistons and big cam.