12-20-2025, 01:34 AM

WQ59B

Senior Member

Join Date: Jan 2006

Location: NJ

Posts: 112

Exhaust heat riser removal

Have a '64 389, with the exhaust crossover blocked at the heads.
I know Pontiac eliminated the heat riser valve for '69, so I was thinking I might remove it from mine.

What's the best way to go about doing this? Almost seem like it's be less work to remove it all & tap/plug the holes, than trying to separate the butterfly & leave the 'axle' in place.

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