Thanks for the info. I have a suspected COPO Camaro, which has a Yellow front spring tag, which appears to be 3955725.
Based on a process of elimination, and if you discount the original BE rear, MN coded engine and owner history of the Camaro, the most likey senarios are that the Camaro is either an SS 350 or COPO L72.
While the HA/BA tags were used in many applications this tag on this particular Camaro, based on options seems to point in the direction of L72. (An SS350 would be to light for this spring based on the chart )
Options: AM Radio,Tach Gages/Console and Cowl Induction, Heavy Duty Radiator.
What do you think??