How to tell h.o. car - Pontiac GTO Forum
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post #1 of 6 (permalink) Old 06-20-2008, 08:40 AM Thread Starter
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How to tell h.o. car

I am in the process of buying a 67 gto. I brought it to a local classic car restorer that is very reputable. He said I may have hit the jackpot and may have an h.o. gto. How do I find out..

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post #2 of 6 (permalink) Old 06-20-2008, 08:57 AM
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Send the VIN # to PHS and they will tell you for sure what options the car came with from the factory.
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post #3 of 6 (permalink) Old 06-20-2008, 04:19 PM
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You can check and see if the engine is HO by getting the engine letter code from the front of the block and the casting number from the back of the block. As Rukee said, PHS is the way to tell if the car left the factory with the High Output option.


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post #4 of 6 (permalink) Old 06-25-2008, 07:01 AM
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Check The Codes Off The Motor And Run Phs On The Car
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post #5 of 6 (permalink) Old 06-26-2008, 01:00 AM
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the brake lines on pasenger side are ran different than none HO my line goes under frame rail not over and makes a180 to connect at wheel look in from passenger side wheel if it goes strait up non ho
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post #6 of 6 (permalink) Old 06-26-2008, 06:48 PM
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A '67 HO car will have a WS engine code if it's got a manual trans. It will also have the header-type high flow exhaust manifolds. The Positive battery cable will be routed differently to the starter than on a standard GTO. It will also have an open element air cleaner assembly, not the flat pancake type with louvres on it.
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