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#1
03-07-2005, 05:29 PM
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670 heads
what is the size of the rocker arm studs (bolts) for the stock 670 this is for the 67 gto 400
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#2
03-09-2005, 08:18 AM
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Re: 670 heads
Loaded question... common area of confusion. The "base thread" is 7/16-14 (where the stud screws into the head). The top thread is 3/8-24 (where the rocker nut torques down to keep the rocker in place). This is the same for all Pontiac V8s through '79 (beginning in '67), with any head with "screw-in" studs. The Pineer rep[lacement part number is RM-357. Melling number is MRDS-939.
Where are you going with this? Modifications? Confused computer operator at Auto Zone? (can't really be called a "parts guy")
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#3
03-09-2005, 08:23 AM
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Re: 670 heads
thanks for the info, I am installing a new cam and lifters, I wanted to replace the rockers, with some true 1.5 ratio ones, I wasn't sure what size the stud was, Do you know of any companies that sell non roller thats 1.5 ? either way I want another set.
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