Found the time to break her down and discovered 2 issues.
The Valve stem seals had all displaced. When I had originally disassembled the heads I found that the prior seals had all disintegrated to almost nothing. Put the new guides on and now that I have once again torn her apart, I find that they do not stay put. Seems a good question to ask is 'Do we need to use Valve stem seals on a 1990 at all?' The stem seals for 1990 differ greatly from following years for which I've never had issue. The small blue seals work and stay put. The 1990 stem architecture is much different in its design and makes me think that most probably it ran without its seals in place for some time, I suspect a great long time. I'd even speculate they just may be completely unnecessary altogether. So, how many of you readers would argue that a 90RRC needs its VSS's?
As for the compression, I only thing I could find suspect were the headbolt installations. Each bolt input needed a retapping and perhaps the previous headbolt installation never torqued correctly because of this. Rings placement were all correct and valve seats were good.