Guide plates for 142 heads - Pontiac GTO Forum
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post #1 of 4 (permalink) Old 07-31-2012, 09:16 AM Thread Starter
 
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Guide plates for 142 heads

I had these converted to ARP screw-in studs, and neither the factory guide plates I have nor the PRW plates would fit.
By fit I mean the holes for the studs do not line up or are even large enough.
Are there another type that'll fit, or do I even need them?


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post #2 of 4 (permalink) Old 07-31-2012, 11:23 AM
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I wouldn't run without them myself. The factory plates should work just fine after you drill the stud holes just large enough so that the threaded end of the stud will pass through them. If they won't line up after doing that, then I'd be suspicious of whoever did your machine work because that means they've changed where the stud center-lines are. That would give me pause....

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post #3 of 4 (permalink) Old 07-31-2012, 02:49 PM Thread Starter
 
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The heads didn't have guide plates in the first place, does that make a difference? The factory ones I robbed from my #13


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post #4 of 4 (permalink) Old 07-31-2012, 11:47 PM
 
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factory guide plates will fit all Pontiac heads if proper machine work was done.
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