Finally decided on a cam for teen SB. Should I bother with header?

Well, 3500 rpm with my 3.23 gearing is like 105mph.
I would then ask, why go any faster. In fact, where can you go any faster on the street.

So yeah, it's far more important for me to get to 105 and having a huge grin on my face, than taking it any faster in a car that does not feel safe to do so in the first place.
So you're running 33" tall tires ? 26" tire with 3.23 at 3500 rpm + 83 - 85 mph , should not be racing on the street anyway . 105 on the street is a bit dangerous , around my parts it's directly to jail .
Here is a calculator to figure out how fast you might be going
http://www.bigblockdart.com/forum/speedtire.php