Scot,
I suggest cross posting this over on the XK engine forum to get the most eyes on it. At a glance I think some people will balk about the fact that the builder left out the D-washers on the cam stud bearing caps. This most often happens because it can be challenging to get them started because with the extra thickness the nuts won’t grab on the threads. It’s easy enough to get around that by starting the nuts on a few studs to get it threaded down to the point where the D washers fit on, and then go back and put the washers on the studs you started with.
Since you already have it open, I’d take a moment and verify the timing. I’d verify compression if you haven’t already. Take a swipe on that assembly lube and make sure it hasn’t petrified. If it has then the oil won’t wash it away and you’ll burn out the bearings in no time. Hoping this isn’t the case because if so then you’ll be pulling it apart to clean them and also pulling the pan to remove the main bearing caps.
Before getting ready to start it, go ahead and fill the cam galleries with oil to the point it starts to drain back. No sense waiting for them to fill up, assembly lube or no.