I have a 1969 RS/SS Z10 with AC, 4 speed. I want to order new front coils but do not know what the original code should be. Is it HA?
This link will help, it has a spring usage chart with codes.
http://www.camaros.org/suspen.shtml#spring
Greg made this up using factory data:
http://www.chevynova.org/69_12437_L48_L65_Springs.html