Front End Conversion Year?

[RRR18]

Just put new front wheel bearings and seals last weekend. Need some help for future reference. Front end is only thing I haven't rebuilt on my '67. Previous owner or someone put disc on front. Bearings were found to be for HD rotors. My '67 has 2" CPP drop springs (found # on em) and Chassis Tech drop spindles (unsure of drop amount no numbers). The upper control arms have bolted on ball joints.
Sooooo....How do I tell what year of parts I currently have on truck so I can buy in future when they wear out? I bought the bearings for a '75 but found those crossed with a bunch of other years.
I'm guessin I have mostly a 73-87 setup but I'm not for sure. How to tell? Give me any and all info. Thanks