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Pontiac of the Month

Steve Morris' 1967 GTO

2021 May
of the Month

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I was looking at engine rebuild kits and it was listing 64 389 separate from 65-66. I was curious what the difference was. I purchased a 64 389 with intentions to build it for my 65 lemans and want to make sure nothing is too different. Thank you in advance.

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The earlier 389s were reverse flow cooling...(Different cylinder heads and intake manifolds among other things) Pretty sure but not 100%....That they changed to a conventional coolant flow sometime in or around late 1964 or early 1965....???

Edited by TWO LANE BLACK TOP
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