Chevy Head Flow comparison table
 

This is a PDF file, need Adobe Acrobat Reader, free download available at http://www.adobe.com/products/acrobat/
http://racingfeed.com/downloads/chevy_flow_data.pdf

Just what I was looking for. I have a set of 461's and was thinking of upgrading, now I think I will just rebuild them and put in the appropriate springs for my new cam.

Great info. Just want to point out, that flow numbers have become more of a marketing tool than a measurement of performance. That's a great chart. First I've seen with a HP number.

But then again, I don't trust dynos either :D....