Somewhere I saw a chart that showed rates for springs, I keep finding ones that are 350 witho ut air uses this, 454 with air uses that, I guess I am too anal, I want to find the chart that shows spring in lbs per inch. Anyone know where to find that?

Try, http://www.classiccarsprings.com/chevy/8chevelle.html

I have never seen a list of aftermarket springs to be used for a big block.
The assembley manual will have a list of springs for each engine, six cylinder, v8 smallblock, and big block.
This is from late 2005 and I haven't looked at it since.

Its in the GM parts manual