[FC] Rampside rear coil springs

[Doug Bell]

Has anyone had success with the replacement coil springs offered by our
vendors?  According to an article written by  Bob Kirkman in 94 GM made 4
different springs for the FC's.  I would like to know which one was used by
the vendors as a standard?  My 61 springs were the weakest of all the years
and I would like to find some stronger replacements but not sacrifice
camber.   Anybody have  GM # 3829556?  Thanks for your time and advice.
Doug Bell