Matt, if nobody else has said it, welcome to the site. I would agree with ALLT4 that if you want to save money and get the most power, save it for the 350. Stuff for the six can cost more. I've found quite a few guys here that "dare to be different" though.
If you have time to read it, check out a post from October called "will these headers fit a 194, confusing and misleading" started by Mark Sipes. It's pretty long, but there's quite a bit of discussion about the options for a Chevy six. It strays from the original subject a bit but there are some good pictures from Sgtsteve. Having spent quite a bit of money on performance parts for my six, I would consider duplicating his setup for minimum cost and cold weather driveablility. I don't know where you're located, but here in Seattle it's in the lower 30's in the morning and my motor doesn't like it.