With the hooker long tubes I’m getting interference with the pitman arm when the wheel is turned left. Anyone else have this issue or a solution? thanks!
Making a little dent for clearance really isn't a big deal. It's been tested by multiple dyno operators on TV, the internet, and in magazines. In theory the largest cross sectional area for a given circumference, but I think the lesson is that area doesn't change that much until the tube gets crushed very badly.
Thanks again guys! I was leaning towards the hammer mod but wanted to make sure shimming the engine or something else wasn’t something people did.
Here is an interesting video of dyno testing dented headers as Jaybee mentioned. https://drivetribe.com/gallery/JeQd6GfzRxuoV1zNnGtYWA?mid=BwmBLFR7RDOcZHEFsx7yJg