Now I'm too curious... ehall posted a pic of LCA and spring bolts from his 91 XJ. But I know for a fact that the LCA bolts from my 91 MJ look just like every other LCA and spring bolt I've ever seen. Time to investigate further.
(if a part number is new for that year, I've bolded it, so you can follow the changes more easily)
84-86:
LCA bolt - 3420 1334
LCA nut - 1150 2814
spring bolt - 3420 1392
spring nut - 1150 2814
87-90:
LCA bolt - 3420 1392 note: now the same as the spring bolts from previous split
LCA nut - 1150 2814
spring bolt - 3420 2118 note: entirely new part
spring nut - 1150 2814
91-96:
LCA bolt - 3420 2118 note: now the same as the spring bolts from previous split
LCA nut - 1150 2814
spring bolt - 3420 2118
spring nut - 1150 2814
97-99:
LCA bolt - 3420 1334 wtf?! back to the 84-86 part number!
LCA nut - 1150 2814
spring bolt - 3420 2118
spring nut - 1150 2814
00:
LCA bolt - 3420 1334
LCA nut - 0650 3672
spring bolt - 3420 2118
spring nut - 1150 2814
01:
LCA bolt - 3420 1334
LCA nut - 0650 3672
spring bolt - 3420 2118
spring nut - 0650 3672 note: same nuts as used on LCA bolts previous split
As usual when dealing with Chrysler I'm left saying "uh... but... um... WHY?!" It appears they simply changed random bolts back and forth from different lengths to other lengths over the entire production run. Some of these parts, like the nuts, are exactly the same, others, like the bolts (1334 vs 2118) differ in length by 10mm. I have no idea why ehall ended up with 110mm LCA bolts and 120mm leaf bolts, the 110mm bolts supposedly hadn't been used since '86 and weren't going to be used again till '97. And my '98 has 120mm bolts in all locations, while the listings show 110mm LCA bolts... I can only conclude that the factory was on crack (likely) and/or the Chrysler official OEM book of lies is nearly as bad as the Haynes book of lies (also likely.)