Correct part numbers for restoration

[TDW]

I am collecting parts for a 69 L78 Chevelle restoration. I need rear shocks for the F41 suspension. The AIM lists a different part number than the P&A does for these shocks. I found a set of NOS ones that have a part number for a 69 passenger car. If a car was judged for something along the lines of a Diamond, would the part number be acceptable as correct? Is there somewhere the information for judging a car is available? Thanks for your time....Tony