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#1
09-27-2025, 07:29 PM
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OG,
So they did away with the heat riser valve in early 68? There was nothing to encourage exhaust flow through the intake? I had no idea. The set of manifolds I have on my (April 68) GTO have (had) the riser, but they are not original to the car. I removed it and plugged the holes.
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#2
09-27-2025, 07:55 PM
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Manifold
My 68 GTO was born in 11/22/67
Great info, I should put my bracket in a glass case, so when someone wants to build an early 68, I got what they need 
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