Sounds like you're having a good time.
Headers / manifold end:
19 ft lbs for each of the 6 bolts / studs.
Flange end:
22 ft lbs for each of the 3 bolts / studs.
Here's a good read if you're interested:
http://986forum.com/forums/showthread.php?t=8612&page=1&pp=20&highlight=headers
Enjoy! Show some pics or sound bytes when you're done!