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Anyone using these PRC heads ? Were you happy with the performance increase ?The chambers and valve guides have been cnc machined. They claim to increase piston to valve clearance. Was wondering how much clearance did you gain. Also what length pushrods did you use ? I know all setups are different. Just trying to get a ball park idea. Thanks
 

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Don't have any info on the heads, but you definitely will want to measure for correct pushrod length as that will be determined once the are heads torqued down and also is dependent on lifter preload as that can vary depending on the lifter.
 

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How wild is you cam that you have to worry about ptv clearance? PRC has been around for a while, so their quality is not in question. A quick Google search and you will see most G8 vendors offer their products. They are a logical progression in head design. LS3 heads have known faults in the port design. These heads take advantage and improve the ports as cast. Do you need new heads? You could spend less and have your heads ported and get more flow than the as cast PRCs.
 
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