[Mr70]

I'm showing front coil spring #3955725 was an HB suffix code recommended on the 1969 Camaro:
*Model 12367 with Heavy Duty springs and base engine when front weight was between 359-440lbs.
*Model 12437 with Heavy Duty springs AND base engine AND JL-8 brakes when front weight was between 345-426lbs.
*Model 12437 with Heavy Duty springs and either L-35,L-35,L-78 engine when front weight was between 345-426lbs.
*Model 12437 with Standard springs and either L-34,L-35,L-78 engine when front weight was between 345-426lbs.
*Model 12467 with Standard springs and either L-34,L-35,L-78 engine when front weight was between 263-344lbs.
*Model 12437 with Heavy Duty springs and either L-48,L-65 engine when front weight was between 345-426lbs.
*Model 12437 with Heavy Duty springs with Z/28 when front weight was between 263-344lbs.
*Model 12467 with Heavy Duty springs with Base engine,but NOT JL-8 when front weight was between 263-344lbs.