Heath: I wouldn't worry too much about the iron. All the reports on my 6.9L with 140K on it are at a similar level and the universal averages are more than what yours showed.
The lead is another matter, but even that isn't horrible (remember we are reading in Parts Per MILLION here and the universal averages are 45 ppm). Still, my lead reading at a 5300 mile OCI was 4 ppm, and at 6100 miles only 5 ppm (both on the same 15W40 Rotella-T CJ-4 oil). At the time I was only running a PSD type filter (which filters a little better than the standard 6.9/7.3L filter), but I now also run a 1 um bypass filter).
Icanfixitall brings up a good point with the timing. I have seen speculation that there is strong correlation between high lead reading and timing on diesels, so if yours has been bumped a lot, you might back off the timing a little to see. Quick and easy to do, huh?
I would also ditch the Lucas. Cripes, man, 18.66 cSt is well into SAE 50 grade territory! I can't see how that would cause your lead problem, but in general, you don't need oil that thick unless your oil temp exceeds 212F (the viscosity rating temp for oil- when your oil is cooler than that, it's even thicker!!!) for long periods. If you lived in South Texas, maybe. Kentucky doesn't get that hot. Oil too thick for the temperature only increases fluid friction and costs fuel economy. Plus, on a cold start, it increases the chance that your oil filter will go into bypass and pump unfiltered oil until it warms enough to thin some. Until I got some free Royal Purple 15W40 to try, I had reverted to 10W30 Rotella-T and got one great report from it.
Overall, don't lose sleep over this. I'd back the timing off a coupla degrees and sample again at the next change.
