Here's some info I have for those interested from a set of NOS shocks I purchased about 10 years ago. Technically the rear 'EH' shocks are correct for Z28 only but the front shocks were used on both L78 & Z28. The 2 letter shock code data is gathered from a few buildsheet pictures that I've saved. This can be updated or corrected as needed. FRONT SHOCKS 1970/71 Z28 and L78 - Part number on shock 3192132, 2 letter code on sticker = 'BJ' Date code in pic 346-69 = 346th day of 1969 or Dec. 12, 1969 1970 & 71? Small block with F41 option, 2 letter code on shock = 'BH' REAR SHOCKS 1970/71 Z28 - Part number on shock 3192282, 2 letter code on sticker = 'EH' The date code on these shocks is mid 1970 but don't have pic of the date. 1970 & 71 big block or small block with F41 - Part number on shock 3192293, 2 letter code on sticker = 'FD'