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

jerry6 said
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

Oh, duh.my speedo has been wrong for so long I forgot, after putting in the 3.23 gear. My speedo was hitting over 100 when rpms were at 3500, which I rounded up to 105. I seemed to guess that speedo was about 8-10mph faster than actual, but, no way is it that off. What gives here.

Anyway, the point I wanted to make was that 6K rpm is not a reality with my auto.

And thanks for link