that's the thing, ownership hadn't changed yet. introduction of the 4.0 was the big change for 87. far as I can tell, chrysler branded parts didn't arrive until 89. I realize my evidence is few and far between, but it would appear they definitely upgraded the cluster board in 87. can't imagine it was due to faults though, as the 86 boards would still be like-new. guess it was a lucky improvement.