Bob you said your header kit was a Hooker kit for BB Chevy. ( man it was all I could do to type those words).
What chasis were they for and or can you give me the part number ??? Thanks.

Sorry so slow to respond. Hooker weld-up kit # 2959
2-3/8" primary's. 4-1/2" collectors. Then I got a set of Dynatech slip-on collectors, I didn't like the weld-on's that came with them.
email me if you need a price. Thanks Bob
afterhrs@bright.net

No Problem on the time delay. I didn't get to check back for your response until this morning anyway.
Is that kit for a truck ??
This question is up for any and everyones response.
When is a header tube to large or is that possible.
Thanks alot Bob. Keep us update on your progress.

It is a univeral kit. It works great for outside the frame, it would be a lot of work to fit them inside the frame. It's avalible in 2-1/8, 2-1/4 and 2-3/8. I went with 2-3/8 because we are looking at going to more cubes soon.

If I were to build or buy another set of headers they would be out side the frame. In my opinion they are the only way to go.
I was asking the question about the tube size because I'm still unsure about what would be a good size to go with. I was hoping to get some input as to what I can use for a guide line. EI: cubic inch, RPMs and maybe HP levels.
I see alot of the Mud Boggers here running large tube headers but some of them are running 6 & 7 hundred cid motors with big Alum. heads. and this isn't or ever will be my case.
Thanks again Bob for all the info.

My Input on headers sizes .

Stock 460 1 3/4" primaries 2 1/2" collector
466 to 485 1 7/8" Primaries 2 1/2" to 3" collectors
486 to 509 2" Primaries 3" to 3 1/4" Collectors
510 to 535 2 1/8" Primaries 3 1/2" to 4 " collectors
536 to 557 2 1/4" to 2 3/8" Primaries 4" 4 1/2" collectors

Dont know much about step tube headers.

My 2 Cents

Dan

here is a formula for pipe length for a give pipe inside dia. (cid*1900)/(d*d*rpm)
Swany