Mocking up C460 headers.

Hey everyone, hope I got this in the right section.

Building a 645” C head engine with single carb, wanting between 1100-1200hp. I’m looking to see what people are using as primary tube length and collector size and length.
I think diameter wise it will go 2 1/4” step up to 2 3/8” unless someone says otherwise
I don’t have cam specs yet so the calculators are useless
Need some real word experience here, it’s for a mud truck, there’s nothing in the way so I don’t need any crazy bends in it.

Thanks for reading!
Edit** As I’m looking through all the calculators I realize this may be to general of a question**
Derrick

Can just build a set of Zoomies?

Out the good stacks to stay out of the mud

I would actually like to use zoomies or uprights. My old engine had uprights.
They have too serve dual purpose. Dyno duty and then in my truck so zoomies are out because of the dyno.

We have some weird rules around here too, uprights can cause you to be bumped up a class. I want to run as many classes as possible

Here is the first design, pipes all within 3/4” at 30 inches of primary tube.
Please critic, I can take it haha!

FRanger wrote:Here is the first design, pipes all within 3/4” at 30 inches of primary tube.
Please critic, I can take it haha!

Looks like a damn good idea.

Wish I could take credit for it lol.
It’s the kit from GP Headers. Pretty sweet!

I think all the plastic connections are going to melt!! Just kidding, those look pretty good.

Thanks, but they told me it was high temp haha!!