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Discussion Starter #1
ALLRIGHT i have the proformer heads and a z303 Cam right. The block is a 306 with low comp pistions with a SC on it. Do i need to change my pushrods?? Cuz the z303 cam has a .552 lift .If i use the ford racing ones will the valves hit the pistons?? What size and kind of push rods i need!!!Thanks for the help guys.
 

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Discussion Starter #3
What about the size??
 

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the length depends on how the rockers are sitting on the valve stem. you need a push rod checker and dial it in till the rocker is riding in the center of the stem.....then measure the lenght and thats the size you need
 

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Yes, Smith Brothers sells an adjustable (~$15 or so) made to use with your normal springs (some will not hold up to the pressure of anyting but light checker springs) and will sell you chrome moly pushrods at a custom length (~$170) or a standard length that is very close (~$100). The size of the stock PR is 5/16".

www.pushrods.net
 

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Discussion Starter #7
allright thanks man
 
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